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H-Ala-Pro-Pro-Pro-Ser(OtBu)-NH2 is a protected pentapeptide with the sequence alanine (Ala), proline (Pro) residues, and serine (Ser). The H- group at the N-terminus indicates that the alanine residue is unprotected, allowing for direct participation in peptide synthesis. The serine residue has its hydroxyl group protected by the OtBu (tert-butyl) group, preventing it from reacting prematurely. The C-terminus of the peptide is amidated, indicated by -NH2, which often helps in stabilizing the peptide and can be useful for further chemical modifications or conjugations. This peptide is designed to introduce a specific sequence of amino acids into peptide chains while ensuring controlled reactivity and stability during synthesis.
