Used in peptide synthesis as a building block for creating specific peptide sequences. It is particularly valuable in solid-phase peptide synthesis (SPPS) due to the Fmoc (fluorenylmethyloxycarbonyl) protecting group, which can be easily removed under mild basic conditions. This compound is often employed in research and development of bioactive peptides, pharmaceuticals, and enzyme substrates. Its structure, incorporating alanine and proline residues, makes it useful for studying peptide stability, folding, and interactions in biochemical studies. Additionally, it serves as a precursor in the preparation of more complex peptides for therapeutic and diagnostic applications.