Used as a building block in peptide synthesis, Cyclo(L-Ala-L-Pro) serves as a conformationally constrained dipeptide mimic that helps stabilize specific secondary structures in designed peptides and peptidomimetics. It is employed in medicinal chemistry to enhance metabolic stability and bioavailability of peptide-based drug candidates. Its rigid cyclic structure influences backbone geometry, making it useful in structure-activity relationship (SAR) studies and in the development of bioactive compounds targeting enzymes and receptors. Additionally, it finds use in the study of proline-rich motifs in proteins and in the design of foldamers.