The BTN3A2 gene encodes a member of the butyrophilin (BTN) family and the immunoglobulin (IG) superfamily. The gene resides in the juxta-telomeric region of the major histocompatability class 1 locus and is clustered with the other six family members, including BTN, BTN2A1, BTN2A2, BTN2A3, BTN3A1, and BTN3A3, on chromosome 6. The full-length protein encoded by this gene is a type I membrane protein. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq].