Thiolmono-reactiveCyanine3dye.ThisreagentcanbeusedtoattachCyanine3fluorophore(ananalogofCy3®)toproteinsandpeptidescontainingcysteineresidues,aswellastootherthiolatedmolecules(suchasthiol-containingoligonucleotides).
CystinesshouldbereducedwithTCEP(tris-carboxyethylphosphine)orotherappropriatereductantpriortothelabeling.
LabelingwithCyanine3maleimideisselective,andefficient.
Werecommendusingwater-solubleSulfo-Cyanine3maleimideforthelabelingofantibodiesandothersensitiveproteins.
Generalproperties
Appearance: | redpowder |
Molecularweight: | 615.20 |
Molecularformula: | C36H43ClN4O3 |
Solubility: | solubleinorganicsolvents(DMF,DMSO,dichloromethane),insolubleinwater |
Qualitycontrol: | NMR1H,HPLC-MS(95%) |
Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. |
Spectralproperties
Excitationmaximum,nm: | 555 |
ε,L⋅mol−1⋅cm−1: | 150000 |
Emissionmaximum,nm: | 570 |
Fluorescencequantumyield: | 0.31 |
CF260: | 0.04 |
CF280: | 0.09 |