Protein analysis is a research area that involves the study of proteins in various biological samples to understand their structure, function, and interaction within a cell or organism. This field encompasses a wide range of techniques and methodologies to analyze proteins, including protein purification, mass spectrometry, Western blotting, enzyme-linked immunosorbent assays (ELISA), and protein-protein interaction studies. Protein analysis is crucial for understanding protein expression levels, post-translational modifications, and signaling pathways in various biological processes and diseases. It plays a significant role in biotechnology, drug development, and personalized medicine.