CTC1 is a symbol for the gene, CTS telomere maintenance complex component 1, in humans. Other names include: CST complex subunit CTC1; Conserved telomere maintenance component 1; HBV DNAPTP1-transactivated protein B; alpha accessory factor 132; conserved telomere capping protein 1; AAF-132; AAF132; C17orf68; CRMCC; tmp494178. The encoded protein has an amino acid length of 1217 and a mass of 134.6 kDa. Other isoforms may exist. CTC1 is a member of the CTC1 family. This gene shares homology with other species, including: Mouse, Rat, Arabidopsis, Zebrafish, Frog, Chicken.