Down syndrome critical region gene 4 is an alias for the gene, Down syndrome critical region 4, in humans. Other names include: Down syndrome critical region protein 4; Down syndrome critical region protein B; DCRB; DSCRB. The encoded protein has an amino acid length of 118 and a mass of 13.0 kDa. Other isoforms may exist. This gene shares homology with other species, including: E. coli.