Ovaj gen je u potpunosti sadržan u introna 22 faktora VIII; obuhvata manje od 2 kb i transkribira se u smjeru suprotnom od faktora VIII. Dio introna 22 (int22h), koji sadrži F8A, ponavlja se dva puta ekstragenski bliže telomeri Xq. Iako je njegova funkcija nepoznata, opažanje da je ovaj gen konzerviran u miša, implicira da ima neku funkciju. Za razliku od faktora VIII, ovaj gen se obilno transkribira u najrazličitijim tipovima.[6]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Levinson B, Kenwrick S, Lakich D, Hammonds G Jr, Gitschier J (Jun 1990). "A transcribed gene in an intron of the human factor VIII gene". Genomics. 7 (1): 1–11. doi:10.1016/0888-7543(90)90512-S. PMID2110545.
Levinson B; Kenwrick S; Gamel P; et al. (1992). "Evidence for a third transcript from the human factor VIII gene". Genomics. 14 (3): 585–9. doi:10.1016/S0888-7543(05)80155-7. PMID1427887.
Levinson B; Bermingham JR; Metzenberg A; et al. (1992). "Sequence of the human factor VIII-associated gene is conserved in mouse". Genomics. 13 (3): 862–5. doi:10.1016/0888-7543(92)90170-W. PMID1639415.
Naylor JA; Buck D; Green P; et al. (1996). "Investigation of the factor VIII intron 22 repeated region (int22h) and the associated inversion junctions". Hum. Mol. Genet. 4 (7): 1217–24. doi:10.1093/hmg/4.7.1217. PMID8528212.