title: Ions, ion-pairs and catalysis by the lacZ beta-galactosidase of Escherichia coli.
mesh_terms: D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D004926:Escherichia coli / Q000201:enzymology; D005696:Galactosidases / Q000378:metabolism*; D007477:Ions; D007763:Lac Operon; D008024:Ligands; D008274:Magnesium; D008968:Molecular Conformation; D013816:Thermodynamics; D001616:beta-Galactosidase / Q000235:genetics / Q000378:metabolism*
chemical_list: D007477:Ions; D008024:Ligands; D005696:Galactosidases; D001616:beta-Galactosidase; D008274:Magnesium