#	Chain	Domain ID	Range	Family	Classification
1	I	e4b1pI1	I:1-84	RNA_pol_Rpb6	152 → 152.1 → 152.1.1
2	J	e4b1pJ1	J:33-81	RNA_pol_Rpo13	4146 → 4146.1 → 4146.1.1
3	M	e4b1pM1	M:1-91	RNA_pol_L_2	305 → 305.1 → 305.1.1
4	O	e4b1pO1	O:1-65	RNA_pol_N	101 → 101.4 → 101.4.1
5	R	e4b1pR1	R:576-715	RNA_pol_Rpb2_6,RNA_pol_Rpb2_5	4042 → 4042.1 → 4042.1.1
6	R	e4b1pR2	R:171-344	RNA_pol_Rpb2_2	4041 → 4041.1 → 4041.1.1
7	R	e4b1pR3	R:476-575	RNA_pol_Rpb2_4	4961 → 4961.1 → 4961.1.1
8	R	e4b1pR4	R:7-170,R:345-475	RNA_pol_Rpb2_1,RNA_pol_Rpb2_3	4010 → 4010.1 → 4010.1.1
9	R	e4b1pR5	R:716-752,R:876-998	RNA_pol_Rpb2_6	1 → 1.1 → 1.1.2
10	R	e4b1pR6	R:999-1125	RNA_pol_Rpb2_6,RNA_pol_Rpb2_7	4043 → 4043.1 → 4043.1.1
11	R	e4b1pR7	R:753-875	RNA_pol_Rpb2_6	325 → 325.1 → 325.1.7
12	S	e4b1pS1	S:37-158	RNA_pol_A_bac	240 → 240.2 → 240.2.1
13	S	e4b1pS2	S:2-36,S:159-263	RNA_pol_L	305 → 305.1 → 305.1.1
14	T	e4b1pT2	T:1-78	SHS2_Rpb7-N	872 → 872.1 → 872.1.1
15	T	e4b1pT3	T:79-178	S1	2 → 2.1 → 2.1.1
16	U	e4b1pU1	U:3-105	RNA_pol_Rpb4	102 → 102.1 → 102.1.1
17	V	e4b1pV2	V:5-117	RNA_pol_RpbG	2 → 2.1 → 2.1.1
18	X	e4b1pX2	X:5-48	375.1.1.0	375 → 375.1 → 375.1.1
19	Y	e4b1pY4	Y:101-130,Y:214-257	4956.1.1.0	4956 → 4956.1 → 4956.1.1
20	Y	e4b1pY6	Y:64-100,Y:258-394	RNA_pol_Rpb1_5	4954 → 4954.1 → 4954.1.1
21	Z	e4b1pZ1	Z:1-76	RNA_pol_Rpb5_C	840 → 840.1 → 840.1.1

ECOD domains (colored by index)Unclassified protein regionsNucleic acids (RNA/DNA)Ligands/cofactors