Duringthelastyears,Cyanine5(ananalogofCy5®)hasbecomeanincredIBLypopularlabelinlifescienceresearchanddiagnostics.Thefluorophorehasitsemissionmaximumintheredregion,wheremanyCCDdetectorsexhibitmaximumsensitivity,andBIOLOGicalobjectsshowlowbackground.Thedyecolorisveryintense,thereforequantitiesassmallas1 nmolcanbedetectedingelelectrophoresisbynakedeye.
ThisCyanine5NHSester(analogtoCy5®NHSester)isareactivedyeforthelabelingofamino-groupsinpeptides,proteins,andoligonucleotides.Thisdyerequiresasmallamountoforganicco-solvent(suchasDMForDMSO)tobeusedinlabelingreactions(pleaseseeourrecommendedprotocolformoredetails).Thisreagentisidealforverycost-efficientlabelingofsolubleproteinsaswellasallkindsofpeptidesandoligonucleotides.Thisreagentalsoworkswellinorganicsolventsforsmallmoleculelabeling.Formoresophisticatedtargetssuchaseasilydegradableproteins,whentheuseofDMForDMSOisundesirable,considerusingwater-solublesulfo-Cyanine5NHSesterwhichdoesnotrequireanyco-solvent,andfeaturesverysimilarfluorescentproperties.
Cyanine5fluorophoreiscompatiblewithvariousinstrumentationincludingmanyfluorescentmicroscopes,imagers,scanners,andfluorescencereaders.AnumberofvariousCyanine5analogsexist-Cyanine5NHSestercanreplaceactivatedestersofCy5®,AlexaFluor647,andDyLight649.
Generalproperties
Appearance: | darkbluepowder |
Molecularweight: | 616.19 |
CASnumber: | 1032678-42-4,350686-88-3 |
Molecularformula: | C36H42ClN3O4 |
Solubility: | goodinpolar(DMSO,DMF)andchlorinated(DCM,chloroform)organicsolvents,lowsolubilityinwater |
Qualitycontrol: | NMR1H,HPLC-MS(95%) |
Storageconditions: | Storage:12monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. |
Spectralproperties
Excitationmaximum,nm: | 646 |
ε,L⋅mol−1⋅cm−1: | 250000 |
Emissionmaximum,nm: | 662 |
Fluorescencequantumyield: | 0.2 |
CF260: | 0.03 |
CF280: | 0.04 |