BOR2, or SIX homeobox 5, is a human gene encoded by SIX5. It may also be known as: Homeobox protein SIX5; Sine oculis homeobox homolog 5; DM locus-associated homeodomain protein; DMAHP. The encoded protein has an amino acid length of 739 and a mass of 74.6 kDa. Other isoforms may exist. BOR2 is a member of the SIX/Sine oculis homeobox family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish.