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SmallGTPasesareasuper-familyofcellularsignalingregulators.ThesmallRas-likeGTPaseRap1isanevolutionaryconservedproteinthatoriginallygainedinterestbecauseofitscapacitytorevertthemorphologicalphenotypeofRas-transformedfibroblasts.Rap1isregulatedbyalargenumberofstimulithatincludegrowthfactorsandcytokines,butalsophysicalforceandosmoticstress.Rap1wasshowntoregulatemultiplebasiccellularprocesses.ThebeststudiedaspectofRap1functioninendothelialcellsinvolveditsroleinregulationofcell-celljunctionformationandremodeling. CurrentlythereisnodirectassaytomeasuretheactivationofRap1GTPases. NewEastBiosciencesRap1ActivationAssayKitisbasedontheconfiguration-specificmonoclonalantibodythatspecificallyrecognizesRap1-GTP,butnotRap1-GDP.Giventhehighaffinityofmonoclonalantibodiestotheirantigens,theactivationassaycouldbeperformedinashorttime.Thisassayprovidesthereliableresultswithconsistentreproducibility. Theseanti-Rap1-GTPmonoclonalantibodiescanalsobeusedtomonitortheactivationofRap1incellsandintissuesbyimmunohistochemistry. NewEastBiosciencesRap1ActivationAssayKitprovidesasimpleandfastmethodtomonitortheactivationofRap1.Eachkitprovidessufficientquantitiestoperform20assays. AssayPrincipleNewEastBiosciencesRap1ActivationAssayKitbasesontheconfiguration-specificanti-Rap1-GTPmonoclonalantibodytomeasuretheactiveRap1-GTPlevels,eitherfromcellextractsorfrominvitroGTPΓSloADIngRap1activationassays.Briefly,anti-activeRap1mousemonoclonalantibodywillbeincubatedwithcelllysatescontainingRap1-GTP.TheboundactiveRap1willthenbepulleddownbyproteinA/Gagarose.TheprecipitatedactiveRap1willbedetectedbyimmunoblotanalysisusinganti-Rap1rabbitpolyclonalantibody.
ProtocolforIF/IHC
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