ARMCX2 is a symbol for the gene, Armadillo repeat containing, X-linked 2, in humans. Other names include: Armadillo repeat-containing X-linked protein 2; ARM protein lost in epithelial cancers on chromosome X 2; Protein ALEX2; ALEX2; GASP9. The encoded protein has an amino acid length of 632 and a mass of 65.7 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat.