PDBID	Molecule/ Organism	Pfam	Residues	HETATM	Symmetry	Pubmed	View
4lon	HTH-TYPE TRANSCRIPTIONAL REGULATOR CYSB Salmonella enterica	LysR_substrate	ASP B 226 ASP B 228 ASP A 226 ASP A 228	None	homomer cyclic	-
6hfc	NEURAMINIDASE Influenza A virus	Neur	ASP A 114 ASP B 114 ASP C 114 ASP D 114	None	homomer cyclic	-