Tetraspanin 28

**Definition:** A tetraspanin protein that is involved in a variety of cellular functions including BASEMENT MEMBRANE assembly, and in the formation of a molecular complexes on the surface of LYMPHOCYTES.

**Tree numbers:** - D12.776.543.900.070

**Synonyms:** - Antigens, CD81 - CD81 Antigen - TAPA-1 Antigen