Protein separation is a branch of research that focuses on ways to isolate and separate proteins from complex biological samples, such as blood, urine, or tissue extracts. This process is essential for studying protein structure and function, as well as for various biotechnological and medical applications. Protein separation techniques typically involve methods such as gel electrophoresis, chromatography, and centrifugation, which allow scientists to separate proteins based on their size, charge, or affinity for specific binding molecules. These methods are often used in combination to achieve high levels of purity and specificity in protein samples.