PDBID Molecule/
Organism		 Pfam Residues HETATM Symmetry Pubmed View
1lu9 METHYLENE TETRAHYDROMETHANOPTERIN DEHYDROGENASE
Methylorubrum extorquens		Mpt_NHIS A  30
HIS B  30
HIS C  30
None
homomer
cyclic		12176390
3qp1 CVIR TRANSCRIPTIONAL REGULATOR
Chromobacterium violaceum		Autoind_bindHIS A  29
HIS A  33
HIS B 177
None
homomer
cyclic		21504831
3wit PUTATIVE VGR PROTEIN
Escherichia coli		-HIS A 637
HIS B 637
HIS C 637
None
homomer
cyclic		24307403