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 (hō′mə-sĭs′tə-ēn′, -ĭn, -tē-)
An amino acid, C4H9NO2S, not found in proteins, that is used by the body in cellular metabolism. Elevated concentrations in the blood are associated with an increased risk of heart disease.

[homo-, homologous with (from homologous) + cysteine.]


(Chemistry) an amino acid occurring as an intermediate in the metabolism of methionine. Elevated levels in the blood may indicate increased risk of cardiovascular disease
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Results: Significantly elevated level of homocysteine was observed in epileptic patients on CBZ therapy.
We helped ignite the debate with our 1981 publication showing high homocysteine blood levels increase heart attack and stroke risk.
This is the first observational investigation stratified by sex to evaluate the correlation between sexual frequency and serum homocysteine levels," wrote the researchers, in the (http://www.
Homocystinuria is the term used for several rare genetic disorders (diseases passed down through families) that cause levels of homocysteine to build up in blood and urine.
Homocysteine is a non-protein-forming sulfur-containing amino acid first described by Butz and du Vigneaud in 1932.
Homocysteine is produced by metabolism of methionine amino acid in our body.
Comment: High plasma homocysteine levels have been associated with depression.
The novel MaxDiscovery Homocysteine Enzymatic Assay Kit employs simplified endpoint analysis to offer high sensitivity and low detection limits.
More limited evidence suggests that exposure to Pb may increase plasma homocysteine concentration.
Homocysteine is a sulphur-containing amino acid derived from the metabolic demethylation of dietary methionine.
Vitamin B12 is an essential cofactor in homocysteinemeta bolisem to methionine and vitamin B6 by cystathionine 6 synthase converts homocysteine to cystathionine [10].
Very few studies have evaluated the effect of vitamin B12 on homocysteine levels after exposure to nitrous oxide during general anesthesia.