이 유전자는 Abd-B 호메오박스 계열의 일원으로 호메오박스 DNA 결합 도메인으로 단백질을 암호화한다.그것은 2번 염색체에 위치한 호메오박스 D 유전자 클러스터에 포함된다.부호화된 핵단백질은 발달하는 사지 싹에서 발현되는 배열 특이적 전사 인자로 기능하며 분화와 사지 발달에 관여한다.
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