The Protein Data Bank (PDB) is a comprehensive database that stores three-dimensional structures of biological macromolecules, primarily proteins and nucleic acids. Researchers can access this information to study the molecular details of these structures, which are crucial for understanding biological functions and processes. Established in 1971, the PDB is maintained by the Research Collaboratory for Structural Bioinformatics (RCSB). It provides valuable resources for scientists in fields like biochemistry, molecular biology, and drug design, facilitating advancements in areas such as medicine and biotechnology.