CST complex subunit Stn1 N-terminal (IPR018856) is a DNA binding protein that is specific to telomeric DNA.A brief single-stranded G-rich 3' overhang (G-tail) and double-stranded repeat sequences make up telomeres. G tails of 100-250 bases are detected throughout the cell cycle, and human telomeres contain repeats of the sequence CCCTAA/TTAGGG [47], which range in length from 2 to 50 kilobase pairs. Restriction of telomere capping protein 4 C-terminal (IPR028094). This domain represents the C-terminal domain of the yeast RTC4 (restriction of telomere capping protein 4) protein. Saccharomyces cerevisiae's loss of RTC4 impairs the cellular response to telomere decapping. This domain is also found in proteins that contain the DNA-binding myb domain.