title: Interpretation of the difference index as a guide to protein sequence identity.
mesh_terms: D000595:Amino Acid Sequence; D005982:Glutathione Transferase / Q000032:analysis; D008956:Models, Chemical; D009591:Nitrogenase / Q000032:analysis
chemical_list: D009591:Nitrogenase; D005982:Glutathione Transferase