Cyanine5maleimideisamono-reactivedyewhichselectivelycoupleswiththiolgroups(forexample,withcysteinesinpeptidesandproteins)togivelabeledconjugates.
Cyanine5isananalogofCy5®,acommonfluorophorewhichiscompatIBLewithvariousinstrumentationlikemicroscopes,imagers,andfluorescencereaders.
Forthelabelingofantibodiesandsensitiveproteinswerecommendtousethewatersolublesulfo-Cyanine5maleimide.
Generalproperties
Appearance: | darkbluepowder |
Molecularweight: | 641.24 |
CASnumber: | 1437872-46-2;1437796-65-0 |
Molecularformula: | C38H45ClN4O3 |
Solubility: | solubleinorganicsolvents(DMF,DMSO,dichloromethane),insolubleinwater |
Qualitycontrol: | NMR1H,HPLC-MS(95%) |
Storageconditions: | Storage:24monthsafterreceivalat-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 |