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α-Chymotrypsin was crosslinked to give a water-insoluble polymer by treatment with the bifunctional reagent glutaraldehyde. The specific activity of the crosslinked enzyme in aqueous media was three orders of magnitude lower than for the native chymotrypsin. In a medium containing more than 50%...
The effect of surfactants on the hydrolysis of prochiral and chiral substrates by crude and purified porcine pancreatic lipase (PPL, EC 188.8.131.52)) has been studied. Rather than accelerating the reactions, surfactants slowed down (“inhibited”) the reactions relative to the rate in the absence...
In this report, we demonstrate that the initial activity of lipases from Rhizopus delemar and Candida rugosa encapsulated in Water /AOT/isooctane reverse micelles is greatly enhanced when short-chain n-alkanols (
Enzyme-catalyzed kinetic resolution is sometimes performed starting with substrate already containing small amounts of the racemic product. Then the determination of the enantiomeric ratio may be seriously disturbed when this parameter is calculated from the degree of conversion and the...
Enzymatic transesterification of sucrose, α-methyl glucopyranoside and octyl-D-glucopyranoside with tributyrin, vinyl octanoate and vinyl laurate was carried out in nearly anhydrous pyridine using the bacterial protease, alcalase. The enzyme monoacylated both the α and β anomers of...
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