TCO(tetrazine–trans-cyclooctene)ligationisoneofthefastestreactionsusedforbioconjugation.Itisaninverseelectrondemand[4+2]cycloadditionthattakesplacebetweentetrazineandtrans-cycloocteneorotherstrainedolefin.
Sulfo-Cyanine5tetrazineisafluorophorederivativebearingatetrazinegroupfortheTCO-ligationbasedlabeling.
ThisreagentpossessesgoodaqueoussolubilityandstABIlityinBIOLOGicalenvironments.
Generalproperties
Appearance: | darkbluesolid |
Molecularweight: | 864.09 |
Molecularformula: | C42H46KN7O7S2 |
Solubility: | goodinwater,DMF,DMSO |
Qualitycontrol: | NMR1H,HPLC-MS(95%) |
Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. |
Spectralproperties
Excitationmaximum,nm: | 646 |
ε,L⋅mol−1⋅cm−1: | 271000 |
Emissionmaximum,nm: | 662 |
Fluorescencequantumyield: | 0.28 |
CF260: | 0.04 |
CF280: | 0.04 |