Poly(ethylene glycol) 2-aminoethyl ether biotin

Poly(ethylene glycol) 2-aminoethyl ether biotin, average M_n 5,300, cross-linking reagent carboxyl reactive, amine, biotin

Poly(ethylene glycol) 2-aminoethyl ether biotin, average M_n 3,700, cross-linking reagent carboxyl reactive, amine, biotin