BTN3A1 (Butyrophilin Subfamily 3 Member A1) is a Protein Coding gene. Among its related pathways are Innate Immune System and T Cell Co-Signaling Pathway: Ligand-Receptor Interactions. An important paralog of this gene is BTN3A3. BTN3A2 (Butyrophilin Subfamily 3 Member A2) is a Protein Coding gene. Among its related pathways are Innate Immune System and Butyrophilin (BTN) family interactions. An important paralog of this gene is BTN3A3.This gene encodes a member of the immunoglobulin superfamily, which resides in the juxta-telomeric region of the major histocompatability class 1 locus and is clustered with the other family members on chromosome 6. The encoded protein may be involved in the adaptive immune response. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. BTN3A3 (Butyrophilin Subfamily 3 Member A3) is a Protein Coding gene. Among its related pathways are Innate Immune System and Butyrophilin (BTN) family interactions. An important paralog of this gene is BTN3A1.