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豚鼠皮肤成纤维样细胞;2011104S安防展览网
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ProductSpecification:

AlternativeName:PAR-4
 
Host:Rabbit
 
Immunogen:Syntheticpeptidecorrespondingtoaa136-150(withaC149Sreplacement)ofhumanPAR-4(proteinase-activatedreceptor-4).
 
UniProtID:Q96RI0
 
Speciesreactivity:Human,Rat
 
Applications:FlowCytometry,ICC,IHC,WB
 
Shipping:ShippedonBlueIce
 
LongTermStorage:-20°C
 
ScientificBackground:PAR-4belongstoafourmemberfamilyofGprotein-coupledreceptors(PAR-1to-4)thatareactivatedasaresultofproteolyticcleavagebycertainserineproteases,hencetheirname.Inthismodalityofactivation,aspecificproteinasecleavesthePARreceptorwithinadefinedsequenceinitsextracellularN-terminaldomain.ThiscleavageresultsinthecreationofanewN-terminalsequence(tetheredligand),whichsubsequentlybindstoasiteinthesecondextracellularloopofthesamereceptor.ThisbindingresultsinthecouplingofthereceptortoGproteinsandintheactivationofseveralsignaltransductionpathways1-3DifferentPARsareactivatedbydifferentproteinases.PAR-4isactivatedbyboththrombinandtrypsinwhereasPAR-1andPAR-3areactivatedbythrombinandPAR-2isactivatedbytrypsin1-3.PAR-4canbealsocleavedandactivatedbyotherproteinasessuchascathepsinG.TheintracellularsignalingmechanismsmediatedbyPAR-4activationarenotcompletelyelucidatedbuttheymayinvolvecalciummobilizationdownstreamofphospholipaseCthroughtheGαqpathway1-3TissuedistributionofPAR-4isverybroadwiththehighestexpressionlevelsfoundinlung,testis,pancreasandsmallintestine.Inaddition,PAR-4expressionwasobservedinplatelets,megakaryocytesandleukocytes.StudieswithplateletsderivedformPAR-4knockoutmicehaveestablishedanessentialroleforPAR-4inthrombin-inducedplateletactivation.PAR-4islikelyinvolvedinotherphysiologicalfunctionssuchasregulationofgastrointestinalmotilityandregulationofvascularendothelialcellfunction1-3.
 
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