Sulfo-Cyanine3 DBCO is a water soluble fluorescent dye with cycloalkyne group for copper free Click chemistry.
DBCO (dibenzocyclooctyne) is a cyclooctyne with very high reactivity towards azides, still possessing good stability.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.