ATP-binding cassette sub-family A member 13 also known as ABCA13 is a protein that in humans is encoded by the ABCA13 gene on chromosome 7. It belongs to the wide ATP-binding cassette family of proteins. The protein contains 5058 residues, and is currently the largest known protein of the ABC family.
^Prades C, Arnould I, Annilo T, Shulenin S, Chen ZQ, Orosco L, Triunfol M, Devaud C, Maintoux-Larois C, Lafargue C, Lemoine C, Denèfle P, Rosier M, Dean M (2002). "The human ATP binding cassette gene ABCA13, located on chromosome 7p12.3, encodes a 5058 amino acid protein with an extracellular domain encoded in part by a 4.8-kb conserved exon". Cytogenet. Genome Res.98 (2–3): 160–8. doi:10.1159/000069852. PMID12697998.