What's Base Excision Repair Systems Require Glycosylases?

-Base excision repair is triggered by directly removing a damaged base from DNA. -Base removal triggers the removal and replacement of a stretch of polynucleotides. -The nature of the base removal reaction determines which of two pathways for excision repair is activated. -The polδ/ε pathway replaces a long polynucleotide stretch; the polβ pathway replaces a short stretch.