PerCPisafluorescentperidinin-chlorophyll-proteincomplexisolatedfromdinoflagellates.WeoffertheformfoundinDinophyceaesp.withamolecularweightofabout35.5kDa.Ithasabroadspectrumofexcitationwithamainpeakat482nm,andalongStokesshifttoanemissionpeakat677nm.
PerCP,AlexaFluor®488(orFITC),andR-PEareexcitedat488nmwithanargonlaser,andthuscanbeusedforone-,two-,andthree-coloranalyseswithsingle-laserflowcytometers.APCandAlexaFluor®647areexcitedat633nmtogiveafourthcolorwithdual-laserflowcytometers.
PerCPisalsohighlywatersoluble,hasarelativelylowisoelectricpoint,andlackspotentiallystickycarbohydrates.
ItshouldbenotedthattherelativelyhighmolecularweightofPerCPmayprecludeitsuseinproceduresrequiringgoodpenetrationintocellsandtissues.Itispredominantlyintendedforsurfacelabelingofcellsforflowcytometry.
