Western杂交(主要内容如下) PreparingProteinLysates WesternBlotting ·Southerns,Westerns,andNortherns:MolecularCloningTechniques(BrianWhite,MIT)Basictheory,definitionandprocedureswithillustration ·WesternBlotting(HowellLab)Proceduresforpreparationofcelllysate,gel,electrophoresis,transfer,antibodydetectionandstrippingmembranes. ·WesternBlots(WilliamH.Heidcamp) ·WesternBlottingProtocol(TheCellBIOLOGyandCytoskeletonGroup,HMS) ·ProteinGelandStaining(GottschlingLab) ·WesternBlotting(CorbettLab) ·ECMProtocolsWesternBlot(LTI)GeneralprotocolforECMassay.AmixtureofproteinisseparatedelectrophoreticallybySDS-PAGE,andtheindividualproteinbandsaretransferredtonitrocellulosepaper.Specificantibodyisthenusedtoprobeforanyofthebandsitmightbindto,andthenonboundantibodyiswashedaway.Theboundantibodyisthendetectedbytheadditionofasecondantibodyagainsttheimmunoglobulinspeciescontainedinthefirstantibody.Thissecondantibodyislabeledwithanenzyme,andthespecificproteinbandcanthenbevisualizedbytheadditionofanenzymesubstratecontainingacolordeveloper. ·AlkalinePhosphatase(AP)StainingofWesternBlots.(MolecularGeneticsRecLab) ·Enzyme-AssistedImmunoelectroblotitng(IEBorWesternBlotting)(MolecularBiologyTechniquesManual)ThisprotocoldescribestheuseofhorizontalblottingofsimpleSDS-PAgels,andsubsequentdetectionofproteinsusingrabbitantiseraandalkalinephosphatase-conjugatedgoat-anti-rabbitIgG,detectedusingbromo-chloro-indolylphosphate(BCIP)andNitro-bluetetrazolium(NBT)salts. ·ProteinDot-/Slot-Blotting(Schleicher&Schuell)Dot-blotsofproteinsimplifyquantitativeassaysbydirectapplicationofthesampletoamembraneorfiltersheetwithoutpriorfractionation.Thetechniqueisusedforcarryingoutbindingassaysonmultiplesamples,andisvaluableforstudiesinwhichpurificationorotherprocessingofthemoleculemayalterbiologicalactivity.Thelatteradvantagemakesthedot-blottechniqueidealforpreliminaryscreeningtodeterminetheeffectofblottingorassayconditionsontheactivityofthesample. ·Alkalinephosphatase(AP)stainingofWesternblots(MolecularGeneticsNetworkLab) ·CDP-StarWesternBlotDetection(GimilaLab) FarWesternBlotting ·FarWesternBlotting(KrauseLab) SemiDryBlotting ·WesternBlottingUsingtheSemiPhorSemi-DryTransferUnit(GoldbergLab)Veryniceanddetailedprotocolwithillustration ·SemiDryBlotting ·WesternTransferUsingaSemidryApparatus(PMCI) StrippingWesternMembranes ·StrippingandReprobingaWesternBlot(KPL) ·StrippingWesternMembranes(PaulBrennan)Reuseblotbystrippingantibodies ·StrippingWesternMembranes(MonicaColitti)Simpleprotocolforreusingblot Troubleshootingandothers ·TroubleshootingWesternAndDot-BlotAssays(Schleicher&Schuell) ·Tipsandhintsforthestorageofantibodies(SynapticSystems) ·TooManyBandsonWesternBlot(SynapticSystems)Itisnotuncommonthat,contrarytothetheoreticalpredictions,severalbandsaredetected.AlthoughitispossIBLethattheantibodyisnotentirelyspecificfortheprotein,otherfactorsmayberesponsible