单词	homocysteine
释义	homocysteine noun ho·​mo·​cys·​te·​ine ˌhō-mō-ˈsi-stə-ˌēn  ˌhä-  : an amino acid C4H9NO2S that is produced in animal metabolism by the demethylation of methionine and that appears to be associated with an increased risk of cardiovascular disease when occurring at high levels in the blood Example Sentences Recent Examples on the Web More specifically, methylenetetrahydrofolate reductase converts the amino acid homocysteine to another, methionine. Tara C. Smith, SELF, 18 Mar. 2019 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, CNN, 13 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, chicagotribune.com, 6 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, CNN, 13 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, chicagotribune.com, 6 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, CNN, 13 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, chicagotribune.com, 6 Apr. 2018 Because folic acid can lower homocysteine levels, researchers once hoped that folic acid supplements would prevent heart attacks and strokes. Liz Szabo, chicagotribune.com, 6 Apr. 2018 See More Word History Etymology International Scientific Vocabulary hom- + cysteine First Known Use 1932, in the meaning defined above Medical Definition homocysteine noun ho·​mo·​cys·​te·​ine ˌhō-mō-ˈsis-tə-ˌēn  ˌhäm-ō-  : an amino acid C4H9NO2S that is produced in animal metabolism by the demethylation of methionine and forms a complex with serine that breaks up to produce cysteine and homoserine and that appears to be associated with an increased risk of cardiovascular disease when occurring at high levels in the blood
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