National Center for
Biotechnology Information

4A3C: RNA Polymerase II initial transcribing complex with a 5nt DNA-RNA hybrid

Biological Unit for 4A3C: 15-meric; determined by author and by software (PISA)

Molecular Components in 4A3C
Label	Count	Molecule
Proteins (12 molecules)
A	1	DNA-directed RNA Polymerase II Subunit Rpb1 (Gene symbol: RPO21)
B	1	DNA-directed RNA Polymerase II Subunit Rpb2 (Gene symbol: RPB2)
C	1	DNA-directed RNA Polymerase II Subunit Rpb3 (Gene symbol: RPB3)
D	1	DNA-directed RNA Polymerase II Subunit Rpb4 (Gene symbol: RPB4)
E	1	DNA-directed RNA Polymerases I, II, and III Subunit Rpabc 1 (Gene symbol: RPB5)
F	1	DNA-directed RNA Polymerases I, II, and III Subunit Rpabc 2 (Gene symbol: RPO26)
G	1	Rpb7, DNA-directed RNA Polymerase II Subunit Rpb7 (Gene symbol: RPB7)
H	1	DNA-directed RNA Polymerases I, II, and III Subunit Rpabc 3 (Gene symbol: RPB8)
I	1	DNA-directed RNA Polymerase II Subunit Rpb9 (Gene symbol: RPB9)
J	1	DNA-directed RNA Polymerases I, II, and III Subunit Rpabc 5 (Gene symbol: RPB10)
K	1	DNA-directed RNA Polymerase II Subunit Rpb11 (Gene symbol: RPB11)
L	1	DNA-directed RNA Polymerases I, II, and III Subunit Rpabc 4 (Gene symbol: RPC10)
Nucleotides(3 molecules)
N	1	NON Template DNA
P	1	Transcript RNA, 5'-r(cpapgpgp*ap)-3'
T	1	Template DNA
Chemicals and Non-standard biopolymers (9 molecules)
1	8	ZINC ION
2	1	MAGNESIUM ION

* Click molecule labels to explore molecular sequence information.

Citing MMDB