4.1.1.112 4.4 - - 664936 4.1.1.112 4.5 - - 714979 4.1.1.112 5 - cytoplasmic enzyme 4271 4.1.1.112 6 - enzyme assay at 4269 4.1.1.112 6.25 6.75 wild type enzyme 651122 4.1.1.112 6.5 7.5 - 4270, 4275 4.1.1.112 7 - - 4272 4.1.1.112 7 - enzyme assay at 4263 4.1.1.112 7 - pH optimum at about pH 7 for all mutant enzymes except R389A 651122 4.1.1.112 7 7.5 - 4276