BOS3 is an alias for the gene, SIX homeobox 1, in humans. Other names include: Homeobox protein SIX1; Sine oculis homeobox homolog 1; DFNA23. The encoded protein has an amino acid length of 284 and a mass of 32.2 kDa. BOS3 is a member of the SIX/Sine oculis homeobox family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.