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Index / MarkerGene / MarkerGeneTM Fluorescent Protease Assay Kit, Allows quick and simple measurement of general protease activity in biological samples. / Product Detail : M1319 MarkerGeneTM Fluorescent Protease Assay Kit, Allows quick and simple measurement of general protease activity in biological samples.
#M1319 MarkerGeneTM Fluorescent Protease Assay Kit, Allows quick and simple measurement of general protease activity in biological samples.
Product name : MarkerGeneTM Fluorescent Protease Assay Kit, Allows quick and simple measurement of general protease activity in biological samples.
Catalog number : M1319
Supplier name : MarkerGene
Data sheet: Ask more or other datasheet now !
More Details about
Allows quick and simple measurement of general protease activity in biological samples.
Direct fluorescence-based assays for detecting metallo-, serine, acid or sulfhydryl proteases are important in medical, biochemical and cell biology research. Analysis of low levels of protease activity is important in biochemical quality control testing, for analysis of protease inhibitors or cofactors, as well as for basic research application in biology and molecular biology. Several fluorescence-based methods have been developed for detecting protease activity including the fluorescein thiocarbamoyl (FTC)-casein protease assay, in which unhydrolyzed protein must be precipitated with trichloroacetic acid, separated by centrifugation, transferred for measurement and then pH-adjusted to optimize the fluorescence signal. The Fluorescent Protease Assay Kit avoids these time-consuming separation steps by taking advantage of the self-quenching of fluorescein when heavily coupled to protein. This kit uses the conjugated protein, FITC-Casein as a substrate. Casein is a naturally occurring protein in milk that is suitable as a general substrate for a myriad of proteases. Labeled with multiple fluorescent dyes, the substrate exhibits significant fluorescence quenching. Protease-catalyzed hydrolysis releases highly fluorescent-labeled peptides; the accompanying increase in fluorescence is proportional to protease activity and can be conveniently measured in a continuous assay format using a fluorometer equipped with an appropriate (fluorescein) filter set (EX/EM= 490/520 nm). This kit has demonstrated sensitivity of less than 10 mU/mL enzyme. Extensive protease cleavage of the substrate can result in fluorescence increases of greater than 10-fold. In addition to utility for detecting protease contamination of culture media and other experimental samples, the assay can be used to continuously measure the kinetics of a variety of exo- and endopeptidases or to measure the total substrate turnover at a fixed time following addition of the enzyme. Among the enzymes that can be monitored using this method are elastase, chymotrypsin, thermolysin, trypsin, papain, pepsin, cathepsin D and elastase. The kit contains enough substrate for 100 assays and control experiments (96-well microtiterplate, 100 μL reaction volume) and also contains reference standards and a detailed protocol for use. See the references below for more information and applications.
Absorption: (in nm) 490
Emission: (in nm) 520
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