이 유전자는 다양한 [7][8][9]암에서 빈번하게 돌연변이, 삭제 또는 규제 해제되는 영역의 종양 억제유전자 CDKN2A에 인접해 있습니다.이 유전자는 CDK4 또는 CDK6와 복합체를 형성하는 p15Ink4b 단백질로도 알려진 사이클린 의존성 키나아제 억제제를 암호화하고 사이클린 D에 의한 CDK 키나아제 활성화를 방지함으로써 세포 주기 G1 진행을 억제하는 세포 성장 조절제 역할을 한다.이 유전자의 발현은 TGF 베타에 의해 극적으로 유도되는 것으로 밝혀졌으며, TGF 베타 유도 성장 억제에서 TGF의 역할을 시사했다.이 유전자의 두 개의 교대로 스플라이스된 전사는 N 말단 배열을 공유하지만 C [6]말단에서 완전히 다른 단백질을 부호화한다.
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