이 유전자에 의해 코드된 아연 손가락 단백질은 DNA결합 활성이 아데노바이러스 E1A의 작용을 통해 조절되는 여러 세포 전사인자 중 하나이다.전장단백질에서 단백질 분해분열을 통해 50kDa 아미노말단 생성물을 생성한다.단백질은 E1A 유도 인산화로 차등 조절된다.전장 유전자 생성물은 E1A가 없을 때 E4 프로모터의 전사를 억제하는 반면, 50-kDa 형태는 그 [7]존재 하에서 전사 활성제 역할을 한다.
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