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how is uric acid synthesized

by Merlin O'Hara Published 3 years ago Updated 2 years ago
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Uric acid is synthesized mainly in the liver, intestines and the vascular endothelium as the end product of an exogenous pool of purines, and endogenously from damaged, dying and dead cells, whereby nucleic acids, adenine and guanine, are degraded into uric acid.Mar 14, 2017

Full Answer

What foods have high uric acid?

Here's a list of foods likely to raise your uric acid:

  • Beef
  • Pork
  • Lamb
  • Goose
  • Duck
  • Partridge
  • Liver
  • Brain
  • Kidneys
  • Sweetbreads

More items...

What can cause high uric acid?

what causes high uric acid levels in the body?

  • primary hyperuricemia
  • Increased production of uric acid from purines
  • Your kidneys can’t get rid of the uric acid in your blood, which causes their levels to rise.
  • secondary hyperuricemia

What creates uric acid in the body?

What Causes Increased level of Uric acid in the body?

  • Functions of Uric Acid in the body. As said, Uric acid is a waste product formed after the breakdown of a chemical compund named purine.
  • Problems an excess uric acid can cause. ...
  • Causes of Increased uric acid in Body. ...
  • Controlling excess uric acid formation. ...

What things are high in uric acid?

What kind of foods high in uric acid?

  1. Avoid curd and yogurt at your diet. Plenty of protein is found in curd and yogurt. ...
  2. Lentils. Lentils are also high in protein. ...
  3. Non vegetarian food. A high source of purine and protein is meat, fish, and seafood, which breaks down into small pieces in the body and turns into uric acid.
  4. Fruit juice. ...
  5. Junk food disadvantages. ...

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Which enzyme is responsible for the synthesis of uric acid?

Xanthine oxidase [XO EC. 1.2. 3.2] is a key enzyme that plays a role in hyperuricemia catalyzing the oxidation of hypoxanthine to xanthine then to uric acid. The enzyme is situated at the end of the catabolic sequence of purine metabolism [65].

What is uric acid a byproduct of?

Uric acid is a byproduct of the xanthine oxidase (XO) mediated degradation of purines, a pathway that produces ROS and is upregulated in hypertension.

How does purine convert to uric acid?

Uric acid is generated from metabolic conversion of either exogenous (dietary) or endogenous purines, primarily in the liver and intestine. The immediate precursor of uric acid is xanthine, which is metabolized to uric acid by either xanthine oxidase or by its isoform, xanthine dehydrogenase.

Where is uric acid formed?

Uric acid is synthesized mainly in the liver, intestines and the vascular endothelium as the end product of an exogenous pool of purines, and endogenously from damaged, dying and dead cells, whereby nucleic acids, adenine and guanine, are degraded into uric acid.

What removes uric acid from the body?

Purines are also formed and broken down in your body. Normally, your body filters out uric acid through your kidneys and in urine.

What gland produces uric acid?

It is thought that uric acid is mainly produced in the liver and excreted through the urinary tract.

What is the difference between uric acid and urea?

Urea and uric acid are nitrogenous wastes. Nitrogenous wastes produced in the body of the organism lead to form ammonia that must be eliminated from the body. Urea constitutes the nitrogenous wastes in humans. Reptiles and birds produce uric acid as nitrogenous waste.

Does salt cause uric acid?

In this ancillary study of the DASH-sodium trial, we report that sodium intake significantly affects uric acid and blood pressure in opposite directions. Increasing sodium intake decreased uric acid while increasing systolic and diastolic blood pressure.

What is the main cause of uric acid?

Most of the time, a high uric acid level occurs when your kidneys don't eliminate uric acid efficiently. Things that may cause this slow-down in the removal of uric acid include rich foods, being overweight, having diabetes, taking certain diuretics (sometimes called water pills) and drinking too much alcohol.

What food causes high uric acid?

Meat (especially organ meats like liver and sweetbreads) and seafood (like fish and shellfish) can be high in chemicals called purines. When your body breaks them down, your level of uric acid goes up. Instead, go forprotein from low-fat dairy products, like skim milk, cheese, and yogurt.

What are the foods to avoid if you have high uric acid?

Avoid meats such as liver, kidney and sweetbreads, which have high purine levels and contribute to high blood levels of uric acid. Red meat. Limit serving sizes of beef, lamb and pork. Seafood.

What gland produces uric acid?

It is thought that uric acid is mainly produced in the liver and excreted through the urinary tract.

What is uric acid?

Uric acid is a by-product of purine metabolism in humans and certain apes who lack uricase, the enzyme that breaks down uric acid (Figure 1 ). When uric acid production is normal, and its clearance by the kidneys is normal, this metabolic quirk has no ill effects.

Where can uric acid be found?

Uric acid can be ingested directly in the diet (especially in organ meats such as liver, kidney, and sweetbreads), or it can be produced in the body by two pathways involved in purine metabolism (Figure 1).

What is the product of purine metabolism?

Uric acid is a product of purine metabolism. In humans and higher-order primates, there is a tendency to retain high levels of serum uric acid due to the loss of akey enzyme, uricase, which converts uric acid to water soluble allantoin.

How is uric acid regulated?

Serum levels of uric acid are regulated by the balance between its production and excretion and is regulated by genetic and dietary factors. This chapter describes the biomedical importance of uric acid and health implications of hyperuricemia and gout. View chapter Purchase book. Read full chapter.

How does uric acid affect insulin?

Uric acid may contribute to insulin resistance in the liver by inducing mitochondrial oxidative stress and steatosis (adipose degeneration). Uric acid also blocks the ability of insulin to stimulate vasodilatation, which is important for the delivery of glucose to the skeletal muscle. Uric acid also induces inflammation in the adipose tissue with a reduction in the production of adiponectin (hormone that modulates a number of metabolic processes, including glucose regulation and fatty acid oxidation). Finally, uric acid may also have direct effects on the pancreatic islet cells leading to local oxidative stress and islet dysfunction.

What is the end product of protein metabolism in birds?

In birds and reptiles, uric acid is the major end-product of protein metabolism. It is produced by the liver and excreted by kidney tubules; impaired elimination is an indication of renal disease. However, normal levels can be seen in early disease states. Approximately 90% of uric acid is secreted by the proximal tubules in avian species.

Which medication blocks the conversion of xanthine to uric acid by xanthine oxid?

The medication allopurinol, which blocks the conversion of xanthine to uric acid by xanthine oxidase, is effective because xanthine is far more soluble in aqueous solutions than is uric acid. Sign in to download full-size image. Figure 1. Simplified pathway of uric acid metabolism. PRPP, 5-phosphoribosyl- l -pyrophosphate.

Where is uric acid found?

Uric acid is also found in the feces of birds, reptiles, and some mammals. Ukrainian–Austrian chemist Ivan Horbaczewski reported an early synthesis of uric acid from glycine in 1882.

What is uric acid?

Uric acid is notorious for the excruciating pain it produces in gout patients. When the acid is present in high concentrations in the blood, its low solubility causes it to precipitate as sharp crystals in and around joints, notably in the feet.

Does gout affect the immune system?

According to Theodore R. Fields at the Hospital for Special Surgery (New York City), “Gout does not typically affect immune system function.” Adds Shailendra Singh at White River Medical Center (Batesville, AR), “People with gout don’t have a greater risk of getting coronavirus than the general population, but they do have an increased risk of complications if they do get it.”

Is uric acid a purine?

Uric acid is a purine derivative and an oxidative metabolic product of purine nucleotides in humans and other carnivorous animals. It is a weak acid with a p Ka of 5.6 and is sparingly soluble in water. In 1776, Swedish chemist Carl Wilhelm Scheele discovered uric acid in human urine and kidney stones.

What is uric acid?

Uric acid is a chemical that’s produced when your body breaks down purines. Purines are compounds that enter the bloodstream during the natural breakdown of cells in the body. They’re also created during the digestion of certain foods, such as: anchovies. sardines.

How does uric acid get out of the body?

Once purines release uric acid, most of it’s dissolved in the blood and transported to the kidneys, where it’s removed from the body through urination. Some uric acid also leaves the body through defecation. When this process is disrupted, however, your body can produce too much or too little uric acid.

What causes uric acid to be high in urine?

Higher-than-normal levels of uric acid in the urine often indicate gout or kidney stones. Other causes include: a diet high in foods containing purines. obesity.

What does it mean when you have uric acid in your urine?

An increased amount of uric acid in the urine often indicates gout, which is a common form of arthritis . This condition is characterized by severe pain and tenderness in the joints, especially those in the toes and ankles. Other symptoms of gout include: swelling in a joint. reddened or discolored skin around a joint.

Why do doctors order uric acid urine tests?

chills. Your doctor may order a uric acid urine test to determine how well you’re recovering from either kidney stones or gout. A uric acid urine test might also be used to monitor your condition if you’re undergoing chemotherapy or radiation treatment.

Why do you need a uric acid test?

A uric acid test is often performed to help determine the underlying cause of abnormal uric acid levels. By measuring the amount of uric acid in your body, your doctor can evaluate how well your body is producing and removing uric acid. Your doctor can perform a uric acid blood test, or they can test your uric acid using a urine sample.

How do you know if you have gout?

Other symptoms of gout include: swelling in a joint. reddened or discolored skin around a joint. a joint that’s hot to the touch. A high amount of uric acid in the urine can also be a sign of kidney stones. Kidney stones are solid masses made of crystals.

Where does uric acid come from?

The endogenous production of uric acid is mainly from the liver, intestines and other tissues like muscles, kidneys and the vascular endothelium [1]. Uric acid is a C 5 H 4 N 4 O 3 (7,9-dihydro-1H-purine-2,6,8 (3H)-trione) heterocyclic organic compound with a molecular weight of 168 Da.

What is the solubility of uric acid in water?

The solubility of uric acid in water is low, and in humans, the average concentration of uric acid in blood is close to the solubility limit (6.8 mg/dL). When the level of uric acid is higher than 6.8 mg/dL, crystals of uric acid form as monosodium urate (MSU).

What is the end product of a pool of purines and endogenous purine metabolism?

Uric acid production and metabolism are complex processes involving various factors that regulate hepatic production, as well as renal and gut excretion of this compound. Uric acid is the end product of an exogenous pool of purines and endogenous purine metabolism.

How to measure uric acid concentration?

Uric acid concentration might be measured in serum, plasma, urine and in exhaled breath condensate. Determination of uric acid concentration includes phosphotungistic acid methods (PTA), uricase methods, high-performance liquid chromatography methods, dry chemistry systems and biosensor methods. Prior to determination of urate in urine, alkalinization of urine might be necessary, because of urate crystallize at pH lower than 5.75 [3]. The production and catabolism of purines are relatively constant between 300 and 400 mg per day. The kidneys eliminate approximately two-thirds, while the gastrointestinal tract eliminates one-third of the uric acid load. Almost all uric acid is filtered from glomeruli, while post-glomerular reabsorption and secretion regulate the amount of uric acid excretion. The proximal tubule is the site of uric acid reabsorption and secretion, and approximately 90% is reabsorbed into blood. This is primarily accomplished at the proximal tubular level by transporters that exchange intracellular anions for uric acid. Almost all reabsorption of uric acid occurs at the S1 segment of the proximal tubule. In the S2 segment of the proximal tubule, uric acid is secreted to a greater extent than that which undergoes reabsorption. Post-secretory reabsorption occurs at a more distal site of the proximal tubule, and approximately 10% of the filtered uric acid appears in the urine [1]. Hyperuricemia is a key risk factor for the development of gout, renal dysfunction, hypertension, hyperlipidemia, diabetes and obesity. Hyperuricemia occurs as a result of the increased uric acid production, the impaired renal uric acid excretion, or a combination of the two [4]. It is characterized by high uric acid level in the blood, causing deposition of urate crystals in the joints and kidneys [5]. Generally, hyperuricemia in adults is defined as a blood uric acid concentration greater than 7.0 mg/dL in men and 6.0 mg/dL in women. In normal humans, uric acid is excreted in urine. However, uric acid excretion may be impaired by kidney disease, leading to hyperuricemia [2].

What is the normal reference interval for uric acid?

The normal reference interval of uric acid in human blood is 1.5 to 6.0 mg/dL in women and 2.5 to 7.0 mg/dL in men.

Which organs eliminate the most uric acid?

The kidneys eliminate approximately two-thirds, while the gastrointestinal tract eliminates one-third of the uric acid load. Almost all uric acid is filtered from glomeruli, while post-glomerular reabsorption and secretion regulate the amount of uric acid excretion.

What are the functions of purines?

Purines perform many important functions in the cell, being the formation of the monomeric precursors of nucleic acids DNA and RNA the most relevant one. Purines which also contribute to modulate energy metabolism and signal transduction, are structural components of some coenzymes and have been shown to play important roles in the physiology ...

What is uric acid?

Uric acid is a waste product found in blood. It’s created when the body breaks down chemicals called purines. Most uric acid dissolves in the blood, passes through the kidneys and leaves the body in urine. Food and drinks high in purines also increase the level of uric acid. These include:

How to control high uric acid?

Other ways to help control high uric acid levels include: Losing weight, if necessary.

How are high uric acid and gout diagnosed?

Finding an elevated blood uric acid level is NOT the same as diagnosing gouty arthritis. To diagnose definite gout, the uric acid crystals must be seen in the fluid taken from a swollen joint or seen by special imaging of the bones and joints (ultrasound, X-ray or CAT scan).

How is high uric level treated?

If you’re having a gout attack, medication can be used to reduce the inflammation, pain and swelling. You should drink plenty of fluids, but avoid alcohol and sweet soft drinks. Ice and elevation are helpful.

What happens if you have too much uric acid?

If too much uric acid stays in the body, a condition called hyperuricemia will occur. Hyperuricemia can cause crystals of uric acid (or urate) to form. These crystals can settle in the joints and cause gout, a form of arthritis that can be very painful. They can also settle in the kidneys and form kidney stones.

What foods increase uric acid?

Food and drinks high in purines also increase the level of uric acid. These include: Seafood ( especially salmon, shrimp, lobster and sardines) Food and drinks with high fructose corn syrup, and alcohol (especially beer, including non-alcoholic beer)

How to get rid of stones in kidneys?

Drinking more fluid is important. Try to drink at least 64 ounces daily (8 glasses at eight ounces a piece). Water is best. Your doctor may also prescribe medications that help stones pass by relaxing the muscles in the ureter, the duct that urine passes through to get from the kidney to the bladder.

Where is uric acid found?

Uric acid is a byproduct created by the breakdown of purines in the digestive system of your body. Purines are found in several foods but most readily found in meat.

How does uric acid get out of the body?

After this breakdown process, the uric acid travels through the bloodstream into your kidneys and most is actually eliminated through the urinary tract via urination. However, there are instances where you may have an excess of uric acid and are unable to excrete the bulk of this substance through urination. This is the beginning of a significant problem and is where gout comes into play. You may have an increased amount of uric acid in your body because of two ultimate reasons: either your body produces too much of the substance during the digestive breakdown or your kidneys are unable to filter all of the uric acid out of your body properly.

Why is uric acid so high?

The worst problem of all due to an increase in uric acid is the issue of kidney failure. While kidney failure can have many reasons behind its onset, increased uric acid is a common reason and one that happens generally due to chemotherapy drugs used to treat cancer patients.

Why does uric acid increase when you eat meat?

For many people, eating the wrong foods will cause an increase in the amount of uric acid produced because of the purines in the food. Many meats contain higher levels of purines. If you eat a diet high in these types of foods, you will consume more purines than others.

How to increase uric acid?

There are things you can do to increase the levels of uric acid in your blood and also there are things that cause the uric acid levels to increase without you being fully aware of this taking place. For many people, eating the wrong foods will cause an increase in the amount of uric acid produced because of the purines in the food. Many meats contain higher levels of purines. If you eat a diet high in these types of foods, you will consume more purines than others. These will, of course, all be broken down in the digestive process and must be eliminated through the kidneys and urinary tract. The problem, as we discussed, lies in the fact that either the kidneys not having the ability to filter out all of the uric acid or the amount of uric acid being too much for the kidneys to handle.

What happens if you have uric acid?

Some of the problems with increased levels of uric acid can be asymptomatic in certain people for years or could present themselves almost immediately. Gout is normally a problem with immediate consequences and pain. Kidney stones will normally not be detected until the stones begin to travel through the ureters of the urinary system, and then they will be quite painful. The worst problem of all due to an increase in uric acid is the issue of kidney failure. While kidney failure can have many reasons behind its onset, increased uric acid is a common reason and one that happens generally due to chemotherapy drugs used to treat cancer patients. Although this is unavoidable during the time therapy is taking place, eating a diet low in purines and high in other nutrients can possibly help the body remain healthier than if poor eating habits were practiced.

Why does gout cause increased uric acid?

You may have an increased amount of uric acid in your body because of two ultimate reasons: either your body produces too much of the substance during the digestive breakdown or your kidneys are unable to filter all of the uric acid out of your body properly.

The differences between urea and uric acid

Urea is a waste product that is produced when the body breaks down protein. It is present in the blood and is excreted in the urine. Uric acid is also a waste product that is produced when the body breaks down protein.

What are some similarities between urea and uric acid?

Urea and uric acid are both nitrogen-containing compounds. Urea is synthesized in the liver from ammonia, while uric acid is a breakdown product of purine metabolism. Both urea and uric acid are excreted in the urine.

Urea vs uric acid, what role do they play in the body?

Urea and uric acid are two important compounds that play a role in the body. Urea is produced by the liver and is excreted in the urine. It helps to remove excess nitrogen from the body.

How urea and uric acid can impact our health

They are both necessary for the body to function properly, too much urea and uric acid can lead to health problems. High levels of urea can cause kidney damage, while high levels of uric acid can lead to gout and kidney stones.

Which compound is better for our health – urea vs uric acid

In general, urea is considered to be the better choice. It is produced naturally in our bodies and helps to remove toxins and waste products from our blood. Uric acid can also be beneficial in small amounts, but too much can lead to gout. Therefore, urea is generally the better choice for our health.

How we can reduce our urea and uric acid levels

Reducing our urea and uric acid levels can be better for our health. Urea and uric acid are created when our bodies break down protein. Too many of these acids can lead to health problems such as kidney stones and gout. There are a number of ways we can reduce our urea and uric acid levels.

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Keith Chen is Jacks of Science Senior Staff Writer and authority on chemistry and all things science. He is currently a full-time scientific analyst focused on chemical engineering, organic chemistry, and biochemistry. Keith has held roles such as chemist, engineer, and chief technician.

What is uric acid?

Uric acid is a natural waste product from the digestion of foods that contain purines. Purines are found in high levels in some foods such as: certain meats. sardines.

How does the body filter out uric acid?

Normally, your body filters out uric acid through your kidneys and in urine. If you consume too much purine in your diet, or if your body can’t get rid of this by-product fast enough, uric acid can build up in your blood.

Why is uric acid high?

It can also trigger high uric acid levels. This happens because your kidneys must first filter out products that occur in the blood due to alcohol instead of uric acid and other wastes. Some types of alcoholic drinks such as beer are also high in purines.

What foods give off uric acid?

You can limit the source of uric acid in your diet. Purine-rich foods include some types of meat, seafood, and vegetables. All of these foods give off uric acid when they’re digested.

What is it called when you have a high uric acid level?

A high uric acid level is known as hyperuricemia. This can lead to a disease called gout that causes painful joints that accumulate urate crystals. It can also make your blood and urine too acidic.

How to get rid of uric acid?

Eating more fiber will help your body get rid of uric acid. Fiber can also help balance your blood sugar and insulin levels. It also tends to increase satiety, helping to lower the risk of overeating. Add at least 5 to 10 grams of soluble fiber a day with whole foods such as: fresh, frozen, or dried fruit.

How much glucose is in corn syrup?

You’ll also want to keep in mind that high-fructose corn syrup contains a mix of fructose and glucose, usually with 55 percent fructose and 42 percent glucose. This is similar to the ratio of 50 percent fructose and 50 percent glucose in table sugar.

How to control uric acid?

You can include low-impact aerobic workouts for controlling uric acid, gout, and other similar conditions. Heart-pumping activities like bike riding and swimming are the best options for you. However, these workouts will not cause much stress to the knees, ankles, and feet of gout patients. You may also try to move your legs and arms without putting much pressure on your joints.

How to get rid of uric acid in water?

Apple cider vinegar is the best choice for controlling your uric acid. You can add a teaspoon of apple cider vinegar to a glass of water regularly. This vinegar works as a natural cleanser, and it also has malic acid to eliminate uric acid.

Why you should lower your uric acid level?

The presence of uric acid can result in gout. Uric acid crystals, accumulated in joints, cause swelling and pain. You may have several other health problems due to high uric acid. The biggest question of the gout-affected patients is how to reduce uric acid.

What foods help remove uric acid from the body?

This is how you can remove uric acid through your kidneys. The most common high-fiber foods are apples, oats, peas, carrots, cucumbers, barley, strawberries, and oranges.

How much uric acid is dangerous?

High uric acid is responsible for mortality risks. Researchers have found that the serum uric acid of more than 7 mg/dL can increase your mortality risk by 22%. The risk can be higher for those who are physically inactive. Thus, you must do physical workouts regularly.

What happens when you absorb purines?

Purine is one of the components present in some foods. When your body absorbs purines, it causes the formation of uric acid. A high level of purines can cause the risk of uric acid problems. That is why you must avoid consuming:

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1.Uric acid - Wikipedia

Url:https://en.wikipedia.org/wiki/Uric_acid

28 hours ago Uric acid is generated from metabolic conversion of either exogenous (dietary) or endogenous purines, primarily in the liver and intestine. The immediate precursor of uric acid is xanthine, …

2.Uric Acid - an overview | ScienceDirect Topics

Url:https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/uric-acid

36 hours ago  · More recently (1962), C. Wayne Bills and co-workers at the University of Colorado (Boulder) serendipitously synthesized uric acid from urea while they were seeking a new …

3.Videos of How Is Uric acid Synthesized

Url:/videos/search?q=how+is+uric+acid+synthesized&qpvt=how+is+uric+acid+synthesized&FORM=VDRE

20 hours ago  · Uric acid is a chemical that’s produced when your body breaks down purines. Purines are compounds that enter the bloodstream during the natural breakdown of cells in the …

4.Uric acid - American Chemical Society

Url:https://www.acs.org/content/acs/en/molecule-of-the-week/archive/u/uric-acid.html

18 hours ago  · In humans the final compound of purines catabolism is uric acid. All other mammals possess the enzyme uricase that converts uric acid to allantoin that is easily …

5.Uric Acid Test (Urine Analysis) - Healthline

Url:https://www.healthline.com/health/uric-acid-urine

33 hours ago What is high uric acid level? Uric acid is a waste product found in blood. It’s created when the body breaks down chemicals called purines. Most uric acid dissolves in the blood, passes …

6.Regulation of uric acid metabolism and excretion

Url:https://www.sciencedirect.com/science/article/pii/S0167527315303429

2 hours ago  · Uric acid is a byproduct created by the breakdown of purines in the digestive system of your body. Purines are found in several foods but most readily found in meat.

7.High Uric Acid Level: Causes, Risks, Treatment, Prevention

Url:https://my.clevelandclinic.org/health/symptoms/17808-high-uric-acid-level

18 hours ago  · Urea and uric acid are both nitrogen-containing compounds. Urea is synthesized in the liver from ammonia, while uric acid is a breakdown product of purine metabolism. Both …

8.What Is Uric Acid? - Levels, Causes & Symptoms

Url:https://study.com/academy/lesson/what-is-uric-acid-levels-causes-symptoms.html

32 hours ago  · Eating more fiber can help reduce uric acid levels. Fiber can also help balance your blood sugar and insulin levels. It also tends to increase satiety, helping to lower the risk of …

9.Urea Vs Uric Acid | Jacks Of Science

Url:https://jacksofscience.com/urea-vs-uric-acid/

8 hours ago  · Uric acid is the waste product created due to the digestion of purine-rich foods. Our kidneys play a role in filtering out uric acid. When they fail to perform this function, there is …

10.How to Reduce Uric Acid: Lower Levels Naturally

Url:https://www.healthline.com/health/how-to-reduce-uric-acid

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11.How to Reduce Uric Acid? - 12 Ways to Kill Uric Acid

Url:https://goutpatients.com/how-to-reduce-uric-acid/

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