The esterases of rabbit lung have been investigated from two viewpoints, the cytochemical and the biochemical. To accomplish this objective, we designed and synthesized a series of ester substrates which provide both a cytochemical indicator of the location of the enzyme and a means of following the enzymatic activity in tissue homogenates and subfractions. The substrates are p-nitrophenylthiol...

N a previous paper, we described three different esterases determined by starch I gel electrophoresis in inbred strains of mice (Mus musculus). Two of these esterases were unequivocably controlled by unlinked autosomal loci ( RUDDLE and RODERICK 1965). One locus, Es-3, controlled the formation of an esterase which was named esterase A, and which has been subsequently renamed esterase IV-40 acco...

Donepezil is a piperidine based agent that is used for treatment of Alzheimer’s disases. This agent act as acetylcholine esterase inhibitor and therefore, synthesis of piperidine compounds to evaluate anticholinesterase activity is very popular field in medicinal chemistry [1]. Thus, in this study some novel piperidine derivatives were synthesized in order to observe their probable anticholines...

The generation of C'1 esterase activity in siliconed plasma obtained from individuals with hereditary angioneurotic edema in remission tends to occur spontaneously, but can be hastened during its incubation with preparations of activated Hageman factor. This effect of activated Hageman factor could not be shown during its incubation with normal siliconed plasma, nor could consumption of normal ...

The arginine amidase and arginine esterase activity of human plasma is compared with that of trypsin, thrombin, plasmin, and kallikrein by using the homologous synthetic amino acid substrates, benzoyl arginine amide (BAA) and benzoyl arginine ethyl ester (BAEE). Hydrolyses of BAA and BAEE in plasma are distinguished by several features: pH optimum, heat stability, storage stability, effect of d...

Influenza C virus possesses specific neuraminate-O-acetylesterase as a receptor-destroying function. This enzymatic activity of the viral glycoprotein HEF (Hemagglutinin, esterase activity and fusion factor) can be visualized in situ by the use of distinct color substrates. Hereby the localization, as well as the quantity of synthesized HEF protein is detectable. We further developed the estera...

Iodine-labeled ([125I]) rat urinary kallikrein and rat urinary TAME esterase A2 were used as probes to look for urinary and plasma proteins that bind to these enzymes. Such proteins are presumptive enzyme inhibitors. Complexes formed with labeled enzymes were identified by polyacrylamide gel electrophoresis followed by autoradiography. Urine from young (6 weeks old) Dahl salt-sensitive (S) rats...