Mismatch Repair
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Mismatch repair scans newly replicated DNA for base pairs proofreading missed, then removes and correctly resynthesizes the surrounding stretch of the new strand.
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A mismatch-repair complex detects a mispaired base, distinguishes the newer strand from the template, and replaces the incorrect section.
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Mismatch repair targets errors from replication itself — nucleotide excision repair, covered next, targets damage from outside sources instead.