| Overview | PrinterFriendlyVersion  | 
| Ex/Em(nm) | 545/576 | 
| MW | N/A | 
| CAS# | N/A | 
| Solvent | DMSO | 
| Storage | F/D/L | 
| Category | EnzymeDetection PeptidasesandProteases  | 
| Related | MicroplateReaders BiochemicalAssays  | 
| Spectrum | AdvancedSpectrumViewer | 
ProtocolA:Measureproteaseactivityintestsamples
Note:Thawallthekitcomponentsatroomtemperaturebeforestartingtheexperiment.
1.Prepareworkingsolutions:
1.1 Makeproteasesubstratesolution:Diluteproteasesubstrate(ComponentA)at1:100in2Xassaybuffer(ComponentC).Use50μL/wellofproteasesubstratesolutionfora96-wellplate.
Note:The2XAssayBuffer(ComponentC)isdesignedfordetectingtheactivityofchymotrypsin,trypsin,Thermolysin,proteinaseK,proteaseXIV,andhumanleukocyteelastase.Forotherproteases,pleaserefertoAppendixIfortheappropriateassaybufferformula.
1.2 Trypsindilution:DiluteTrypsin(5U/µL,ComponentB)at1:50inde-ionizedwatertogetaconcentrationof0.1U/µL.
2.Addreagentspreparedinstep1intoa96-wellmicroplateaccordingtoTable1andTable2.
Table1.Layoutofthesubstratecontrol,positivecontrol,andtestsamplesina96-wellmicroplate
SC  | SC  | 
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PC  | PC  | 
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TS  | TS  | 
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Note:SC=SubstrateControl,PC=PositiveControl,TS=TestSamples.
Table2.Reagentcompositionforeachwell
SubstrateControl  | PositiveControl  | TestSample  | 
De-ionizedwater:50µL  | Typsindilution:50µL  | Protease-containingsamples:50µL  | 
Totalvolume:50µL  | Totalvolume:50µL  | Totalvolume:50µL  | 
Note:Iflessthan50μLofprotease-containingbiologicalsampleisused,addddH2Otomakeatotalvolumeof50µL.
3.Runtheenzymaticreaction:
3.1 Add50µLofproteasesubstratesolution(fromStep1.1)intoeachwelloftheassayplate.Mixthereagentswell.
3.2 MonitorthefluorescenceincreasewithafluorescenceplatereaderatEx/Em=540/590nm.
ForkineticreADIng:Immediatelystartmeasuringfluorescenceintensitycontinuouslyandrecorddataevery5minutesfor30minutes.
Forend-pointreading:Incubatethereactionatadesiredtemperaturefor30to60minutes,protectedfromlight.Thenmeasurethefluorescenceintensity.
ProtocolB:Screeningproteaseinhibitorsusingapurifiedenzyme
1.Prepareworkingsolutions:
1.1 Make1Xassaybuffer:Add5mLofde-ionizedwaterto5mLof2XAssayBuffer(ComponentC).
1.2 Makeproteasesubstratesolution:DiluteProteaseSubstrate(ComponentA)at1:20in1Xassaybuffer(fromStep1.1).Use10μL/wellofproteasesubstratesolutionfora96-wellplate.
Note:The2Xassaybuffer(ComponentC)isdesignedfordetectingtheactivityofchymotrypsin,trypsin,thermolysin,proteinaseK,proteaseXIV,andhumanleukocyteelastase.Forotherproteases,pleaserefertoAppendixIfortheappropriateassaybufferformula.
1.3 Proteasedilution:Dilutetheproteasein1Xassaybuffertoaconcentrationof500-1000nM.Eachwellwillneed10µLofproteasediluent.Prepareanappropriateamountforallthetestsamplesandextraforthepositivecontrolandvehiclecontrolwells.
2.Addreagentspreparedinstep1intoa96-wellmicroplateaccordingtoTable1andTable2.
Table1.Layoutofthesamplesina96-wellmicroplate

		