Brain Expressed X-Linked 2, or, BEX2, is a human gene. Other names include: Protein BEX2; Brain-expressed X-linked protein 2; hBex2; DJ79P11.1. The encoded protein has an amino acid length of 128 and a mass of 15.3 kDa. Other isoforms may exist. Brain Expressed X-Linked 2 is a member of the BEX family. This gene shares homology with other species, including: Mouse, Rat.