Protein biology is a branch of biology that focuses on the study of proteins and their functions within living organisms. Proteins are essential molecules that play a critical role in various biological processes, including enzyme catalysis, cellular structure and function, and signaling pathways. Research in protein biology involves studying the structure, function, and interactions of proteins, as well as their involvement in diseases and potential therapeutic applications. Techniques used in protein biology research include protein purification, sequencing, and analysis, as well as methods for studying protein-protein interactions and post-translational modifications. Overall, protein biology is a fundamental area of research that contributes to our understanding of cellular and molecular processes in living organisms.