4.1.1.64	additional information	gene knockout mutants display wild-type morphology and pathogenicity, can use alanine as sole nitrogen source, but not 2-methylalanine	
4.1.1.64	Q52A	85fold decrease in turnover number for decarboxylation half-reaction with 2-aminoisobutyrate and pyruvate, greatly reduced rate of transamination half-reaction and impaired pyridoxamine phosphate binding	
4.1.1.64	Q52E	10000fold decrease in turnover number for decarboxylation half-reaction with 2-aminoisobutyrate and pyruvate, transamination rate is nearly identical to wild-type value	
4.1.1.64	Q52I	100000fold decrease in turnover number for decarboxylation half-reaction with 2-aminoisobutyrate and pyruvate, greatly reduced rate of transamination half-reaction and impaired pyridoxamine phosphate binding