homocysteine hcy biomarker molecule. increased levels indicate elevated risk of cardiovascular disease. skeletal formula.

acid amino artery atomic atoms biomarker blood carbon cardiovascular chemical chemistry composition compound coronary cysteine disease drawing elevated flat formula hcy homo homocystein homocysteine hydrogen hyperhomocysteinemia icon increased indicate infarction level levels line molecular molecule myocardial nitrogen oxygen plasma risk serum skeletal structure sulfur test