Phe-sensitive isozyme, enzyme-Mn2+-2-phosphoglycolate-complexes, hanging drop vapour diffusion method, room temperature, all solutions, except the MnSO4 and the enzyme solution, are treated with Chelex-100 to remove metals, 0.2 mM enzyme subunit solution: 0.37 MnSO4, 4.2 mM 2-phosphoglycolate, 0.1 M Li2SO4, 12% PEG 100 w/v, 20% ethanol v/v, 50 mM 1,3-bis[tris(hydroxy-methyl)methylamino]propane buffer, pH 8.7, reservoir solution: 19% PEG 1000, 0.1 M Li2SO4, 20% ethanol v/v, 50 mM 1,3-bis[tris(hydroxy-methyl)methylamino]propane buffer, X-ray diffraction structure determination and analysis |
Escherichia coli |