Skip to main content

Table 1 Activities of GTP cyclohydrolase II and Riboflavin synthase

From: Metabolic engineering of Escherichia coli for the production of riboflavin

Strain/Plasmid Enzyme activities (nmol/min/mg protein)
GTP cyclohydrolase II a Riboflavin synthase b
E. coli MG1655/p20C-EC10 8.6±0.4 14.3±1.6
E. coli MG1655/p20C-BSrib 6.4±0.3 10.9±0.4
E. coli MG1655/p20C-BS15 6.3±0.2 9.6±0.4
  1. aOne unit of enzyme activity catalyzes the formation of 1 nmol of 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate per min.
  2. bOne unit of enzyme activity catalyzes the formation of 1 nmol of riboflavin per min.