PDBID	Molecule/ Organism	Pfam	Residues	HETATM	Symmetry	Pubmed	View
5tw1	DNA-DIRECTED RNA POLYMERASE SUBUNIT ALPHA Mycolicibacterium smegmatis	RNA_pol_A_bac	PHE A 219 LEU B 215 LEU B 218 PHE B 219	None	heteromer asymmetric	28067618
5vko	DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB1 TRANSCRIPTION ELONGATION FACTOR SPT6 Saccharomyces cerevisiae	SH2_2	PHE A1434 LEU A1438 LEU B1490 PHE B1492	None	heteromer asymmetric	28826505