This gene is a member of the TAFA family which is composed of five highly homologous genes that encode small secreted proteins. These proteins contain conserved cysteine residues at fixed positions, and are distantly related to MIP-1alpha, a member of the CC-chemokine family. The TAFA proteins are predominantly expressed in specific regions of the brain, and are postulated to function as brain-specific chemokines or neurokines, that act as regulators of immune and nervous cells.
^Tom Tang Y, Emtage P, Funk WD, Hu T, Arterburn M, Park EE, Rupp F (Mar 2004). "TAFA: a novel secreted family with conserved cysteine residues and restricted expression in the brain". Genomics. 83 (4): 727–34. doi:10.1016/j.ygeno.2003.10.006. PMID15028294.