WholeIgGantibodiesareisolatedasintactmoleculesfromantiserabyimmunoaffinitychromatography.TheyhaveanFcportionandtwoantigenbindingFabportionsjoinedtogetherbydisulfidebondsandthereforetheyaredivalent.Theaveragemolecularweightisreportedtobeabout160kDa.ThewholeIgGformofantibodiesissuitableforthemajorityofimmunodetectionproceduresandisthemostcosteffective.
Storefreeze-driedpowderat2-8°C.Whenreadytouse,rehydratewithindicatedvolumeofd.waterandcentrifugeifnotclear.Productisstableforabout6weeksat2-8°Casanundilutedliquid.Prepareworkingdilutionfresheachday.Forextendedstorageafterrehydration,addanequalvolumeofglycerol(ACSgradeorbetter)forafinalconcentrationof50%,andstoreat-20°Casaliquid.Note:aftertheadditionofglycerol,theconcentrationofproteinandbuffersaltsisone-halfoftheoriginal.Alternatively,aliquotandfreezetheproductat-70°Corbelowintheabsenceofglycerol.Avoidrepeatedfreezingandthawing.
Expirationdate:oneyearfromdateofrehydration.However,theexpirationdatemaybeextendediftheproductisstoredaccordingtotherecommendationandthetestresultsareacceptableforitsintendeduse.
AlexaFluor®594-conjugatedantibodiesabsorblightmaximallyaround591nmandfluorescewithapeakaround614nm.Theyarebrighter,morephotostable,andmorehydrophilicthanTexasRedconjugates.AlexaFluor®594conjugatesarebrighterthanred-fluorescingconjugates,andtheyprovidemorecolorseparationfromgreen-fluorescingdyesthanDyLight549,Cy3,andTRITCconjugates.Theyarethebestchoiceforimmunofluorescencedetectioninthedeep-redregionofthevisiblespectrum.
