Absent in melanoma 1 is a human gene encoded by the symbol, AIM1. It may also be known as: Absent in melanoma 1 protein; Beta/gamma crystallin domain-containing protein 1; suppression of tumorigenicity 4; beta-gamma crystallin domain containing 1; CRYBG1; ST4. The encoded protein has an amino acid length of 1723 and a mass of 188.7 kDa. Absent in melanoma 1 is a member of the Beta/gamma-crystallin family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Frog, Chicken.