RAB31 is a symbol for the gene, RAB31, member RAS oncogene family, in humans. Other names include: Ras-related protein Rab-31; Ras-related protein Rab-22B; Rab22B. The encoded protein has an amino acid length of 194 and a mass of 21.6 kDa. Other isoforms may exist. RAB31 is a member of the Small GTPase superfamily, Rab family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.