t-Boc-N-amido-PEG12-NHS ester is a PEG linker containing a Boc-protected amino group and an NHS ester group. The hydrophilic PEG spacer increases solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The protected amine can be deprotected in acidic conditions.
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