2.1.1.5 ? x * 40300, 363 amino acid residues 720202 2.1.1.5 ? x * 52000, SDS-PAGE 441241 2.1.1.5 dimer mutant enzmyes R346A and W352A with negligible activity 657666 2.1.1.5 hexamer 6 * 45000, SDS-PAGE -, 441232, 441234, 441235 2.1.1.5 octamer 8 * 45000, SDS-PAGE 441247 2.1.1.5 tetramer - 701995 2.1.1.5 tetramer 4 * 45000, recombinant His-tagged enzyme, SDS-PAGE 441248 2.1.1.5 tetramer crystallization data and sedimentation velocity experiments 673003 2.1.1.5 tetramer wild-type enzyme and mutant enzymes E266A, H338A, R346A, R361A, P362A, N364A and P365A 657666