Tetraspanin 9
[5] 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 that are 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.Alternatively spliced transcripts encoding the same protein have been identified.You can help Wikipedia by expanding it.This article incorporates text from the United States National Library of Medicine, which is in the public domain.