[5][6] The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family.

Most of these members are cell-surface proteins characterized by the presence of four hydrophobic domains.

The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility.

This encoded protein is a cell surface glycoprotein and is highly similar in sequence to the transmembrane 4 superfamily member 2.

This article on a gene on the human X chromosome and/or its associated protein is a stub.