PCNAR is an alias for the gene, Proliferating cell nuclear antigen, in humans. Other names include: PCNA; Cyclin; ATLD2. The encoded protein has an amino acid length of 261 and a mass of 28.8 kDa. Other isoforms may exist. PCNAR is a member of the PCNA family. This gene shares homology with other species, including: Fly, Mouse, Rat, Zebrafish, Frog, Chicken.