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GLOSSARY & ABBREVIATIONS

OSu

N-Hydroxysuccinimide ester

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N-Hydroxysuccinimide esters (OSu, also abbreviated as NHS) are well-established "active esters", Even though more reactive pre-activated amino acid derivatives are available, OSu esters still are commonly used in peptide synthesis and, especially, in peptide modification. OSu esters are safe, sterically unhindered, compatible with aqueous systems, and convenient to handle.

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