Clone REA443 recognizes the human tetraspanin-8 (TSPAN8) antigen, a multi-pass membrane protein which is also known as transmembrane 4 superfamily member 3 (TM4SF3) or tumor-associated antigen CO-029. TSPAN8 is a member of the transmembrane 4 superfamily, which is a group of cell surface glycoproteins that contain four transmembrane domains and two conserved extracellular loops. Tetraspanins interact and form complexes with a wide variety of proteins, including other members of the tetraspanin family, integrins, receptors, and signaling molecules. Through these interactions, they play important roles in fundamental cellular processes such as migration, proliferation, and differentiation. It is suggested that TSPAN8 is widely expressed in various tissues, including in the digestive tract, connective tissue, bone, muscle, and kidney. TSPAN8 has also been intensively studied in the field of cancer. It has been shown to be highly expressed in colorectal, hepatocellular, and pancreatic carcinoma cells along with integrin family proteins. Several studies have suggested that TSPAN8 is also involved in the migration and invasion of cancer cells.

Additional information: Clone REA443 displays negligible binding to Fc receptors.