이 유전자가 인코딩한 막 관련 단백질은 ATP 결합 카세트(ABC) 트랜스포터의 슈퍼 패밀리의 일원이다.ABC 단백질은 세포내외막을 가로질러 다양한 분자들을 운반한다.ABC 유전자는 7개의 뚜렷한 하위 가족(ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White)으로 나뉜다.이 단백질은 MDR/TAP 서브패밀리의 일원이다.MDR/TAP 하위 가족 구성원은 다약물 저항성에 관여한다.이 유전자에 의해 인코딩된 단백질은 분해된 세포독성 펩타이드의 내소성 망막을 가로질러 클래스 I 분자가 모이는 막 결합 칸으로 펌프하는 데 관여한다.이 유전자의 돌연변이는 항경화성 척추염, 인슐린 의존성 당뇨병, 그리고 셀리악 질환과 관련이 있을 수 있다.[7]
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