AOA, or Aprataxin, is a human gene encoded by APTX. It may also be known as: Forkhead-associated domain histidine triad-like protein; FHA-HIT; Aprataxin 1; AXA1; EAOH; EOAHA. The encoded protein is an enzyme with an amino acid length of 356 and a mass of 40.7 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Mouse, Rat, Arabidopsis, Zebrafish, Frog, Chicken.