4-Arm-PEG-CH2CH2COONHS Ester

4-Arm N-hydroxysuccinimide ester-functionalized discrete poly(ethylene glycol) (4-Arm-PEG-NHS) is a 4-arm precision PEG derivative. The PEG arms present terminal N-hydroxysuccinimide ester groups. Discrete chain lengths with different degrees of polymerization are available. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The multiarm structure provides attachment sites for multivalent ligand display or network construction. Arm number, chain length, and functional-group equivalents can be varied to compare crosslink spacing and molecular presentation. In this series, n denotes the number of ethylene glycol repeat units in each PEG arm.

Customization available.