Pronunciation: ho'mo-sis'te-en, -sis'ten
A homologue of cysteine, produced by the demethylation of methionine, and an intermediate in the biosynthesis of l-cysteine from l-methionine via l-cystathionine. Elevated levels of homocysteine have been associated with certain forms of heart disease.
See Also: folic acid
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Examples: glitazone, GI cocktail, etc.