TCI's N-(tert-Butoxycarbonyl)-L-cyclopropylglycine (Boc-L-Cpg) is a Boc-protected unnatural amino acid widely employed as a key building block in peptide synthesis. The tert-butoxycarbonyl group provides temporary N-terminal protection during solid-phase or solution-phase peptide coupling, while the cyclopropyl side chain introduces conformational rigidity into the peptide backbone. This compound is particularly valuable in chemical biology research for designing metabolically stable, constrained peptides used in enzyme inhibitor development, structure-activity relationship studies, and protein-protein interaction modulation.
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