Fig. 3: The vertebrate telomerase complex.

The composition of human telomerase is divided into three parts: TERT, TEN, and Cofactor. They combine together to form telomerase, maintaining the length of telomeres. GAR1 nucleolar protein family A. member 1. NHP2 nucleolar protein family A, member 2. NOP10 nucleolar protein 10. TCAB1 telomerase Cajal body protein 1.