7MEI

Composite structure of EC+EC

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	N	DNA (74-MER)	polymer	74	22801.8	1		Saccharomyces cerevisiae
2	O	DNA (74-MER)	polymer	74	22934.7	1		Saccharomyces cerevisiae
3	a, A	DNA-directed RNA polymerase subunit	polymer	1733	191821.6	2	UniProt (A0A6A5Q1P2) Pfam (PF04997) Pfam (PF05001) Pfam (PF00623) Pfam (PF04983) Pfam (PF05000) Pfam (PF04998) Pfam (PF04992) Pfam (PF04990) UniProt (by SIFTS) (P04050) In PDB	Saccharomyces cerevisiae (Baker's yeast)
4	b, B	DNA-directed RNA polymerase subunit beta	polymer	1224	138937.3	2	UniProt (A0A6A5Q4H2) Pfam (PF04563) Pfam (PF04561) Pfam (PF04565) Pfam (PF04566) Pfam (PF04567) Pfam (PF00562) Pfam (PF04560) UniProt (by SIFTS) (P08518) In PDB	Saccharomyces cerevisiae (Baker's yeast)
5	c, C	DNA-directed RNA polymerase II subunit RPB3	polymer	318	35330.5	2	UniProt (A0A6A5Q0Z3) Pfam (PF01193) Pfam (PF01000) UniProt (by SIFTS) (P16370) In PDB	Saccharomyces cerevisiae (Baker's yeast)
6	d, D	DNA-directed RNA polymerase II subunit RPB4	polymer	221	25451.2	2	UniProt (A0A6A5PTI6) Pfam (PF03874) UniProt (by SIFTS) (P20433) In PDB	Saccharomyces cerevisiae (Baker's yeast)
7	e, E	DNA-directed RNA polymerases I, II, and III subunit RPABC1	polymer	215	25117.1	2	UniProt (A0A6A5Q456) Pfam (PF03871) Pfam (PF01191) UniProt (by SIFTS) (P20434) In PDB	Saccharomyces cerevisiae (Baker's yeast)
8	f, F	DNA-directed RNA polymerases I,II,and III subunit RPABC2	polymer	155	17931.8	2	UniProt (A0A6L0ZRI7) Pfam (PF01192) UniProt (by SIFTS) (P20435) In PDB	Saccharomyces cerevisiae (Baker's yeast)
9	g, G	DNA-directed RNA polymerase II subunit RPB7	polymer	171	19081.1	2	UniProt (A0A6A5Q270) Pfam (PF03876) Pfam (PF00575) UniProt (by SIFTS) (P34087) In PDB	Saccharomyces cerevisiae (Baker's yeast)
10	h, H	DNA-directed RNA polymerases I, II, and III subunit RPABC3	polymer	146	16525.4	2	UniProt (A0A6A5Q8C2) Pfam (PF03870) UniProt (by SIFTS) (P20436) In PDB	Saccharomyces cerevisiae (Baker's yeast)
11	i, I	DNA-directed RNA polymerase II subunit RPB9	polymer	122	14308.2	2	UniProt (A0A7I9EWC2) Pfam (PF02150) Pfam (PF01096) UniProt (by SIFTS) (P27999) In PDB	Saccharomyces cerevisiae (Baker's yeast)
12	j, J	DNA-directed RNA polymerases II subunit RPABC5	polymer	70	8290.7	2	UniProt (A0A6A5Q7Q6) Pfam (PF01194) UniProt (by SIFTS) (P22139) In PDB	Saccharomyces cerevisiae (Baker's yeast)
13	k, K	DNA-directed RNA polymerase II subunit RPB11	polymer	120	13633.5	2	UniProt (A0A6A5Q7A1) Pfam (PF13656) Pfam (PF01193) UniProt (by SIFTS) (P38902) In PDB	Saccharomyces cerevisiae (Baker's yeast)
14	l, L	DNA-directed RNA polymerases II subunit RPABC4	polymer	70	7730.0	2	UniProt (A0A6A5PY05) Pfam (PF03604) UniProt (by SIFTS) (P40422) In PDB	Saccharomyces cerevisiae (Baker's yeast)
15	r	RNA (5'-R(P*AP*AP*CP*UP*AP*GP*UP*UP*AP*AP*GP*AP*GP*GP*UP*U)-3')	polymer	16	5003.0	1		Saccharomyces cerevisiae
16	R	RNA (5'-R(P*UP*CP*GP*AP*GP*AP*GP*GP*AP*UP*CP*CP*CP*AP*A)-3')	polymer	15	4677.9	1		Saccharomyces cerevisiae
17	Q	Transcription initiation factor IIF subunit alpha	polymer	735	82320.6	1	UniProt (P41895) Pfam (PF05793) In PDB	Saccharomyces cerevisiae (Baker's yeast)	TFIIF-alpha,TFIIF large subunit,Transcription factor G 105 kDa subunit,P105
18	M	Transcription initiation factor IIF subunit beta	polymer	400	46684.5	1	UniProt (A0A6A5PZ00) Pfam (PF17683) Pfam (PF02270) UniProt (by SIFTS) (P41896) In PDB	Saccharomyces cerevisiae (Baker's yeast)
19	a, b, c, i, j...	ZINC ION	non-polymer		65.4	16	Chemie (ZN)
20	a, A, R	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)

Contents of the asymmetric unit

Polymers	Number of chains	30
	Total formula weight	1212738.8
Non-Polymers*	Number of molecules	20
	Total formula weight	1143.8
All*	Total formula weight	1213882.6

*Water molecules are not included.