Chemical Formula: C62H88N6O18
Molecular Weight: 1205.39
CAS: N/A
Purity: >90%
Physical Form: light yellow oil
Solubility: DCM, THF, acetonitrile, DMF and DMSO
Storage at: -20 oC/avoid light
Mal-PEG4-(PEG3-DBCO)-(PEG3-TCO) is a heterotrifunctional linker containing a DBCO moiety for click chemistry, a TCO moiety for tetrazine ligation and a maleimide group for sulfhydryl conjugation. The dibenzocyclooctyne group (DBCO) is thermally stable with high specific reactivity toward azide group through strain-promoted click reaction in the absence of a catalyst. TCO will react with tetrazines via inverse electron demand Diels-Alder cycloaddition to form a stable dihydropyridazine linkage. The extremely fast kinetics and selectivity enables the conjugation of two low abundance biopolymers in an aqueous and otherwise complex chemical environment. This bioorthogonal reaction possesses excellent selectivity and biocompatibility such that the complimentary partners can react with each other within richly functionalized biological systems, in some cases, living organisms. Thus, tetrazine-TCO ligation has found numerous applications in fluorescent imaging, drug delivery, PET and SPECT imaging, radionuclide therapy, radiochemistry or drug target identification among several others.
Excellent biocompatibility – strain-promoted click reaction occurs rapidly under mild buffer conditions with no need of accessory toxic copper catalyst
High chemoselectivity – azides and DBCO, tetrazine and TCO groups do not react or interfere with other functional groups found in biological samples but conjugate to one another with high efficiency
Hydrophilic PEG Spacer – reduces aggregation, minimizes steric hindrance, and enhances solubility