method for determination of D-glucose- and D-galactose levels in glycoconjugates. The NAD(P)H produced from the enzymatic oxidation of the monosaccharides reacts with a CuSO4-bathocuproinedisulfonic acid reagent to produce a color complex absorbing maximally at 486 nm. With galactose dehydrogenase and glucose dehydrogenase serving as the model enzymes, reaction analysis gives a linear plot from 2.5 to 250 nmol of sugar. Method has been applicated to sugar released by acid hydrolysis from lactose, porcine submaxillary mucin and raffinose was quantified
Optimizing whole-cell biocatalysts by integrating a recombinant intracellular NADPH regeneration system through co-expression of a glucose facilitator from Zymomonas mobilis for uptake of unphosphorylated glucose and a NADP+-dependent glucose dehydrogenase from Bacillus megaterium that oxidizes glucose to gluconolactone.
Escherichia coli strain expressing both recombinant glucose 1-dehydrogenase and a glucose facilitator for uptake of unphosphorylated glucose shows a nine times higher initial alpha-pinene oxide formation rate corresponding to a sixfold higher yield of 20 mg per g cell dry weight after 1.5 h and to a sevenfold increased alpha-pinene oxide yield in the presence of glucose compared to glucose-free conditions