Cell surface markers are molecules or antigens on the cell membrane used to identify specific cells or organelles, and are crucial for cell classification and functional studies. These markers include proteins, glycoproteins, lipids, and carbohydrates, which play key roles in cell recognition, signaling, intercellular communication, and immune responses.

Research on cell surface markers spans from basic science to clinical applications, aiming to understand cell recognition and classification mechanisms, as well as their roles in disease diagnosis and treatment. Key research areas include the identification of cell surface markers, studies of their functions, their roles in diseases, and their applications in cell therapy and regenerative medicine.