LFS1 is an alias for the gene, Tumor protein p53, in humans. Other names include: Cellular tumor antigen p53; Phosphoprotein p53; Tumor suppressor p53; Antigen NY-CO-13; Li-Fraumeni syndrome; BCC7; P53; TRP53. The encoded protein has an amino acid length of 393 and a mass of 43.7 kDa. Other isoforms may exist. LFS1 is a member of the P53 family. This gene shares homology with other species, including: Fly, Rat, Zebrafish, Frog.