This family of secreted proteins are brain specific and thought to be chemokines [1]. These proteins are found in vertebrates. Proteins in this family are typically between 94 to 133 amino acids in length and contain a number of conserved cysteines.

1: TAFA: a novel secreted family with conserved cysteine residues and restricted expression in the brain. Tom Tang Y, Emtage P, Funk WD, Hu T, Arterburn M, Park EE, Rupp F; Genomics. 2004;83:727-734. PMID:15028294