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UDG-BER activities for MGC nuclear extracts prepared from 6-day-old (6-d/o), 8-day-old, 3-month-old (3-m/o), 16-month-old, and 28-month-old male B6D2F1 mice. Results are presented as means ± SEM of three replicate assays for each of three independent nuclear extract preparations. MGC nuclear extracts from different-aged animals with similar UDG-BER activity are indicated by having the same letter.
