The exosome proteomics refers to the study of the proteins present in exosomes, which are small, membrane-bound vesicles secreted by various types of cells into the extracellular space. Exosomes play an essential role in intercellular communication and can carry a variety of molecular cargo, including proteins, lipids, RNA, and other molecules. Exosome proteomics involves identifying and characterizing the protein content of exosomes to understand their biological functions and potential diagnostic or therapeutic applications.