이 유전자는 카드뮴, 아연, 구리, 은과 같은 중금속에 반응하여 금속 항상성에 관여하는 메탈로티오닌과 다른 유전자의 발현을 유도하는 전사 인자를 암호화한다.이 단백질은 중금속 노출 시 핵에 축적되어 금속 반응성 요소(MRE)[6]를 포함하는 프로모터에 결합하는 핵 세포질 차단 단백질입니다.
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