m-PEG4 NHS Ester is a methoxy-capped PEG reagent with an NHS ester for amine coupling. The PEG4 spacer specifically enhances solubility and biocompatibility, ideal for protein PEGylation, surface modification, and drug delivery applications.
Polyethylene Glycol PEG Linkers > M-PEG > M-PEG-NHS ester
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