3.4.21.97 A133V I-site mutant 95603 3.4.21.97 A134Q oligomerization at high protein concentration 95600 3.4.21.97 A143Q all enzyme samples used in this experiments contain an additional mutation, A143Q. The mutation disables one of the internal cleavage sites but has little effects on the kinetic properties of the enzyme 653320 3.4.21.97 A143Q/D217N the ratio of turnover number to Km-value is 11% of that for mutant enzyme A143Q 653320 3.4.21.97 A143Q/D227N the ratio of turnover number to Km-value is 1273fold lower than that for mutant A143Q 653320 3.4.21.97 A143Q/E31R the ratio of turnover number to Km-value is 44.6fold lower than that for the wild-typelike mutant A143Q 650227 3.4.21.97 A143Q/E31S the ratio of turnover number to Km-value is 4.8fold lower than that for the wild-typelike mutant A143Q 650227 3.4.21.97 A143Q/H157A the ratio of turnover number to Km-value is 22fold lower than that of the wild-typelike mutant enzyme A143Q 650071 3.4.21.97 A143Q/H157E the ratio of turnover number to Km-value is 11.7fold lower than that of the wild-typelike mutant enzyme A143Q 650071 3.4.21.97 A143Q/H157Q the ratio of turnover number to Km-value is 19fold lower than that of the wild-typelike mutant enzyme A143Q 650071