PDB ID:1FR9 Metal site ID: 1FR9-ZN-4 Bound amino acids or nucleotide residues: H2 Group identifier: H2S1 Is homomeric: True Amino acid or nucleotide residue IDs: HIS A.49 All ligands IDs: ACT A.195 Number of coordinating amino acids or nucleotide residues: 2 Number of coordinating ligands: 2 Number of coordinating chains: 2 Number of coordinating chains: 2