Bcl-2 is an alias for the gene, B-cell CLL/lymphoma 2, in humans. Other names include: Apoptosis regulator Bcl-2; protein phosphatase 1, regulatory subunit 50; Bcl-2; PPP1R50. The encoded protein has an amino acid length of 239 and a mass of 26.3 kDa. Other isoforms may exist. Bcl-2 is a member of the Bcl-2 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.