“…So far, peptide transport by the TAP complex has only been studied in a few species, namely human, mouse, rat, and chicken (5,(15)(16)(17)(18)(19). Here, we cloned, expressed, and analyzed the function of more than 20 heterodimeric TAP complexes across different taxa: six mammals (human, cow, pig, dog, mouse, rat: Homo sapiens, Bos taurus, Sus scrofa, Canis familiaris, Mus musculus, and Rattus norvegicus, respectively), and four birds (duck, quail, chicken, turkey: Anas platyrhynchos, Coturnix coturnix, Gallus gallus, and Meleagris gallopavo, respectively).…”