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Official Full Name: tetraspanin 4<br />Also known as: NAG2; NAG-2; TM4SF7; TSPAN-4; TETRASPAN<br />The protein encoded by this gene is a member of the transmembrane superfamily, also known as the tetraprotein family. Most of these members are cell surface proteins characterized by the presence of four hydrophobic domains. These proteins mediate signal transduction events and play a role in the regulation of cell development, activation, growth and motility. The encoded protein is a cell surface glycoprotein whose sequence is similar to its family member CD53 antigen. It is known to bind integrins and other transmembrane superfamily proteins. Alternative splicing transcript variants encoding different isoforms have been identified.