homocysteine is produced by the demethylation of methionine, an essential amino acid
homocystinuria - due to a lack of the enzyme cystathione- beta-synthase which usually convert methionine to cystathione. This results in accumulation of the metabolic intermediates homocysteine and homocystine (referred to as homocyst(e)ine). Homocystine is excreted in the urine
homocystinuria is associated with a high risk of thromboembolic events including stroke and myocardial infarction in early adolescence or even in childhood
evidence suggests that moderately elevated homocysteine plasma levels (moderate hyperhomocysteinaemia) are common in the general population - see menu item
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