
Polθ steric-gate variant extension of RNA primers with 5′ modifications. (A) Schematic of RNA/DNA template. Black stars indicate the location of three consecutive 2′-ribose modifications at the 5′ terminus. (B–F) Denaturing gels showing time courses of PolθRP1 extension of the indicated 5′ modified RNA/DNA template in the presence NTPs and MgCl2.










