Fig. 5From: Determination of key enzymes for threonine synthesis through in vitro metabolic pathway analysisHPLC analysis of metabolites. a Peaks from the standard metabolites of homoserine and threonine, the left peak represents homoserine and the right peak represents threonine. b Homoserine and threonine produced in the in vitro reaction system by purified enzymes. c Homoserine and threonine produced in the in vitro reaction system constituted by crude enzyme extracts.Back to article page