Cytochrome P450 2C19 (abbreviated CYP2C19) is an enzyme protein. It is a member of the CYP2C subfamily of the cytochrome P450 mixed-function oxidase system. This subfamily includes enzymes that catalyze metabolism of xenobiotics, including some proton pump inhibitors and antiepileptic drugs. In humans, it is the CYP2C19gene that encodes the CYP2C19 protein.[3][4] CYP2C19 is a liver enzyme that acts on at least 10% of drugs in current clinical use,[5] most notably the antiplatelet treatment clopidogrel (Plavix), drugs that treat pain associated with ulcers, such as omeprazole, antiseizure drugs such as mephenytoin, the antimalarial proguanil, and the anxiolyticdiazepam.[6]
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^Gray IC, Nobile C, Muresu R, Ford S, Spurr NK (July 1995). "A 2.4-megabase physical map spanning the CYP2C gene cluster on chromosome 10q24". Genomics. 28 (2): 328–332. doi:10.1006/geno.1995.1149. PMID8530044.
^"CYP2C19 gene". NIH Genetics Home Reference. Archived from the original on 6 September 2017. Retrieved 6 September 2017.