TCO-PEG12-DBCO is a long chain PEGreagent containing a TCO and a DBCO moiety. TCO group specifically and efficiently reacts with terrahydrazine under mild condition. DBCO is very reactive toward Azide through click chemistry, the PEG spacer increases the aqueous solubility of the reagent. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.