PDBID	Molecule/ Organism	Pfam	Residues	HETATM	Symmetry	Pubmed	View
2axt	PHOTOSYSTEM II REACTION CENTER D2 PROTEIN PHOTOSYSTEM Q(B) PROTEIN Thermosynechococcus elongatus	Photo_RC	HIS A 215 HIS A 272 HIS D 214 HIS D 268	FE2 A 557	heteromer cyclic	16355230
2gnu	REACTION CENTER PROTEIN L CHAIN REACTION CENTER PROTEIN M CHAIN Rhodobacter sphaeroides	Photo_RC	HIS L 190 HIS L 230 HIS M 219 HIS M 266	FE2 M1307	heteromer asymmetric	17005199
2wjn	REACTION CENTER PROTEIN L CHAIN REACTION CENTER PROTEIN M CHAIN Blastochloris viridis	Photo_RC	HIS L 190 HIS L 230 HIS M 217 HIS M 264	FE2 M 404	heteromer asymmetric	19743880
3fd4	GLYCOPROTEIN GP42 Human gammaherpesvirus 4	-	HIS A 205 HIS A 206 HIS B 205 HIS B 206	None	homomer cyclic	19217393
5y5s	PHOTOSYNTHETIC REACTION CENTER L SUBUNIT PHOTOSYNTHETIC REACTION CENTER M SUBUNIT Thermochromatium tepidum	Photo_RC	HIS L 199 HIS L 239 HIS M 219 HIS M 266	FE L 310	heteromer asymmetric	29618814