9-biotinlaMino-4,7-dioxanonanoic acid N-hydroxysucciniMidyl ester

Biotin-PEG2-NHS ester is an amine reactive biotinylation compound that can couple with primary amino groups (-NH2). The NHS group reacts specifically and efficiently with lysine and N-terminal amino groups at pH 7-9 to form stable amide bonds.

Biotin-PEG 2-NHS ester (CAS# 596820-83-6) is a useful research chemical used in the preparation of rare earth element and fluorescent probes.