Arrestin, beta 2, or, ARRB2, is a human gene. Other names include: Beta-arrestin-2; Arrestin beta-2; arrestin 3; ARB2; ARR2; BARR2. The encoded protein has an amino acid length of 409 and a mass of 46.1 kDa. Other isoforms may exist. Arrestin, beta 2 is a member of the Arrestin family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog.