from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An amino acid used normally by the body in cellular metabolism and the manufacture of proteins. Elevated concentrations in the blood are thought to increase the risk for heart disease by damaging the lining of blood vessels and enhancing blood clotting.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An amino acid which is monitored in the blood to estimate risk of cardiovascular disease.


homo-, homologous with (from homologous) + cysteine.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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