Anti-ESTERASE

Anti-ESTERASE is an IgG fraction antibody purified from monospecific antiserum by a multi-step process which includes delipidation, salt fractionation and ion exchange chromatography followed by extensive dialysis against the buffer stated above.  Assay by immunoelectrophoresis resulted in a single precipitin arc against anti-Rabbit Serum as well as purified and partially purified Esterase [Porcine Liver].  Cross reactivity against Esterase from other tissues and species may occur but have not been specifically determined. Protein function: Involved in the detoxification of xenobiotics and in the activation of ester and amide prodrugs. Active towards triacylglycerides containing short-chain fatty acids from C2 to C6, and 1(3)-monoacylglycerols containing fatty acids from C2 to C12. Inactive on long-chain triacylglycerols and diacylglycerol. Hydrolyzes aromatic and alkyl esters and vitamin A acetate. The hydrolysis rate depends upon the amino acid promoiety and the esterification site of the prodrug. Aromatic promoieties are favored, highest rates are observed with phenylalanyl progdrugs, hydrolysis of valyl and isoleucyl prodrugs is less efficient. With floxuridine prodrugs, activity is higher on 5' monoesters than on 3' monoesters. With gemcitabine prodrugs, activity is higher on 3' monoesters than on 5' monoesters. [The UniProt Consortium]