A peptide library is a collection of diverse peptides, which are short chains of amino acids. These libraries are used in research to study protein interactions, discover new drugs, and develop therapeutic agents. By synthesizing a wide variety of peptides, scientists can identify those that bind effectively to specific targets, such as proteins or receptors in the body. Researchers often create peptide libraries using techniques like solid-phase peptide synthesis. This allows for the rapid generation of thousands of unique peptides, facilitating high-throughput screening. The information gained from these libraries can lead to advancements in fields like pharmacology and biotechnology.