An internal activation strategy-enabled traceless ligation at sterically hindered Val-Xaa site is accomplished under thiol additive-free conditions assisted by a β-mercaptan on the C-terminal valine residue. Click to show full abstract
An internal activation strategy-enabled traceless ligation at sterically hindered Val-Xaa site is accomplished under thiol additive-free conditions assisted by a β-mercaptan on the C-terminal valine residue.
               
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