NEIL1 interaction with FEN-1 is essential for efficient NEIL1-initiated
strand displacement repair synthesis. A, incorporation of labeled
[32P]dTMP was used as a measure of strand displacement repair.
B, inhibition of NEIL1-initiated LP-BER in the presence of point
mutants of NEIL1 and/or FEN-1 with decreased interaction (lanes
3–7). PNK, Polβ, DNA ligase IIIα, and PCNA were present
in all reactions.