Protein chemistry is the study of the structure, function, and interactions of proteins, which are essential biomolecules made up of amino acids. Proteins play critical roles in biological processes, including catalyzing reactions as enzymes, providing structural support, and facilitating communication between cells. Understanding protein chemistry helps scientists explore how proteins work and how they can be manipulated for various applications. The field encompasses various techniques, such as X-ray crystallography and NMR spectroscopy, to determine protein structures. Additionally, researchers investigate how proteins fold and misfold, which is crucial for understanding diseases like Alzheimer's and Parkinson's. This knowledge can lead to the development of new therapies and drugs.