Cbl-b is an alias for the gene, Cbl proto-oncogene B, E3 ubiquitin protein ligase, in humans. Other names include: E3 ubiquitin-protein ligase CBL-B; Casitas B-lineage lymphoma proto-oncogene b; RING finger protein 56; SH3-binding protein CBL-B; Signal transduction protein CBL-B; E3 ubiquitin-protein ligase CBL-B ; Cbl-b; Nbla00127; RNF56. The encoded protein has an amino acid length of 982 and a mass of 109.5 kDa. This gene shares homology with other species, including: Frog.