Protein databases are organized collections of information about proteins, which are essential molecules in living organisms. These databases store data such as protein sequences, structures, functions, and interactions. Researchers use these resources to find and analyze proteins relevant to their studies, aiding in fields like biochemistry, molecular biology, and drug discovery. Some well-known protein databases include UniProt, PDB (Protein Data Bank), and NCBI (National Center for Biotechnology Information). Each database serves different purposes, such as providing detailed protein sequences or 3D structures. By accessing these databases, scientists can enhance their understanding of biological processes and develop new therapies.