Arpin encodes the human gene, Actin-related protein 2/3 complex inhibitor. It may also be known as: Arpin; Arp2/3 inhibition protein; C15orf38. The encoded protein has an amino acid length of 226 and a mass of 24.9 kDa. Arpin is a member of the Arpin family. Homologs of this gene exist in other organisms, including: Frog.