Peptide design is a research area in pharmaceuticals and biotechnology that focuses on the development of peptides, which are short chains of amino acids, for various applications such as drug development, biomaterials, and diagnostics. Researchers in this field design peptides with specific structures and properties to target biological molecules or processes, and optimize their efficacy, stability, and specificity. Peptide design often involves computational modeling, peptide synthesis, and testing in vitro and in vivo to identify peptides with desired functions and therapeutic potential. This research area is constantly evolving with advancements in peptide synthesis techniques, structural biology, and bioinformatics.