单词	homocysteine
释义	homocysteine /ˌhɒmə(ʊ)ˈsɪstɪiːn / /ˌhɒmə(ʊ)ˈsɪstiːn/ noun [mass noun] Biochemistry An amino acid which occurs in the body as an intermediate in the metabolism of methionine and cysteine. Chemical formula: HSCH2CH2CH(NH2)COOH. Metabolism of homocysteine requires an adequate supply of folic acid.... It also lowers the levels of amino acid homocysteine which, when found in high levels in the bloodstream, is linked to an increased risk of heart disease. Levels of homocysteine, the amino acid linked to heart disease, are also higher in smokers.
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