이 유전자는 효소의 시토크롬 P450 슈퍼패밀리의 구성원을 암호로 한다.시토크롬 P450 단백질은 약물 대사 및 콜레스테롤, 스테로이드 및 기타 지질의 합성에 관련된 많은 반응을 촉진하는 단옥시겐이다.이 단백질은 소포체 망막까지 국소화되지만 그 구체적인 기질은 아직 결정되지 않았다.이 유전자는 10q24번 염색체의 시토크롬 P450 유전자의 군집 안에 위치한다.한때 CYP2C17이라는 추가 유전자가 존재한다고 생각되었지만, CYP4217은 현재 CYP2C18과 CYP2C19의 키메라에 근거한 아르테 팩트로 간주되고 있다.[7]
While CYP2C19, CYP2C8, CYP2C9, CYP2J2, and possibly CYP2S1 are the main producers of EETs and, very likely EEQs, EDPs, and the epoxides of linoleic acid, CYP2C18 may contribute to the production of these metabolites in certain tissues.[9][11]
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