Add time:07/26/2019         Source:sciencedirect.com

The proposal that 4-methylumbelliferone esters are substrates for pancreatic lipase was evaluated. Purified pancreatic lipase was found to give only 0.2% the activity with 4-methylumbelliferone caprylate (4-MUCA) as compared to triolein when the usual titrimetric method of assaying lipase was employed. It was demonstrated by fluorometric assay that purified pancreatic lipase has slight activity on the proposed substrate, probably due to incomplete purification, which is indicated by the electrophoresis experiment. Pancreatic extract catalyzes the hydrolysis of 4-methylumbelliferone caprylate when measured by the titrimetric method or the fluorometric method, which indicates a 4-methylumbelliferone esterase. The pancreatic lipase and the 4-MUCA esterase were partially separated by electrophoresis.

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