원산지 인식 콤플렉스(ORC)는 진핵 세포에서 DNA 복제를 시작하는 데 필수적인 6개 서브유닛 단백질 콤플렉스다.효모에 대한 연구는 ORC가 복제의 기원에 특별히 결합하고 있으며 Cdc6와 Mcm 단백질과 같은 추가 개시 인자의 조립을 위한 플랫폼 역할을 한다는 것을 입증했다.이 유전자에 의해 인코딩된 단백질은 ORC 복합체의 서브 유닛이다.ORC2L, -3L, -5L로 핵심단지를 형성하는 것으로 나타났다.동일한 단백질을 인코딩하는 세 가지 다른 분할된 대본 변형들이 보고되었다.[7]
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