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Cystine crystals are hexagonal in shape and are colorless. They are not found often in alkaline urine due to their high solubility. The colorless crystals can be difficult to distinguish from uric acid crystals which are also hexagonal. Under polarized examination, the crystals are birefringent with a polarization color interference. [9]
Cystinuria is an inherited autosomal recessive disease [1] characterized by high concentrations of the amino acid cystine in the urine, leading to the formation of cystine stones in the kidneys, ureters, and bladder. It is a type of aminoaciduria. "Cystine", not "cysteine," is implicated in this disease; the former is a dimer of the latter.
Cystathionase catalyzes cystathionine to cysteine and α-ketobutyrate. [3] Cysteine is an essential amino acid and its conversion from cystathionine occurs in the trans-sulfuration pathway. The availability of cysteine is necessary for the synthesis of an important anti-oxidant, glutathione. [ 2 ]
These foods also contain high levels of sodium nitrite, a compound that may convert into nitrosamines and increase the risk of gastric cancer. Plus they’re a major source of advanced glycation ...
Hyperhomocysteinemia is a medical condition characterized by an abnormally high level of total homocysteine (that is, including homocystine and homocysteine-cysteine disulfide) in the blood, conventionally described as above 15 μmol/L. [1]
Olive Oil. One of the Mediterranean Diet's staple foods, olive oil, is worth highlighting for how it may support your liver health. “Olive oil is a good source of monounsaturated fat—a healthy ...
However, at high protein levels, a net loss of calcium may occur through the urine in neutralizing the acid formed from the deamination and subsequent metabolism of methionine and cysteine. Large prospective cohort studies have shown a slight increase in risk of bone fracture when the quintile of highest protein consumption is compared to the ...
Penicillamine, sold under the brand name of Cuprimine among others, is a medication primarily used for the treatment of Wilson's disease. [1] It is also used for people with kidney stones who have high urine cystine levels, rheumatoid arthritis, and various heavy metal poisonings.