PIN2 is an alias for the gene, Telomeric repeat binding factor (NIMA-interacting) 1, in humans. Other names include: Telomeric repeat-binding factor 1; TTAGGG repeat-binding factor 1; Telomeric protein Pin2/TRF1; NIMA-interacting protein 2; TRBF1; TRF1; hTRF1-AS; t-TRF1. The encoded protein has an amino acid length of 439 and a mass of 50.2 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.