PDBID	Molecule/ Organism	Pfam	Residues	HETATM	Symmetry	Pubmed	View
2ynm	LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE IRON-SULFUR ATP-BINDING PROTEIN Prochlorococcus marinus	Fer4_NifH	ASP A 155 GLY B  38 GLY B 154 ASP B 155	AF3 B1298	heteromer cyclic	23341615
3x1l	CMR4 CRISPR SYSTEM CMR SUBUNIT CMR3 Archaeoglobus fulgidus Pyrococcus furiosus	Cas_Cmr3 RAMPs	ASP B  10 GLY C  47 GLY C 126 ASP C 127	None	heteromer asymmetric	25921071
4wza	NITROGENASE IRON PROTEIN 1 Azotobacter vinelandii	Fer4_NifH	ASP E 129 GLY F  11 GLY F 128 ASP F 129	ACP F1292	heteromer cyclic	25522159