A.RNA聚合酶核心酶-DNA-pppGpN-OH
B.RNA聚合酶核心酶-DNA-引物-ppPGpN’-OH
C.RNA聚合酶全酶-DNA-引物-pppGpN‘-OH
D.RNA聚合酶全酶-DNA-pppGpN’-OH
E.亚基-DNA-pppGpN‘-0H