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VMAT2 activity is unaltered in 9 and 18-month-old G2019S KI mice. Kinetic analysis of [3H]-DA uptake in whole-brain vesicles in the striatum of 9-month-old (A) and 18-month-old (B) G2019S KI mice versus age-matched WT controls. Data are expressed as mean ± SEM of n = 4 animals per group.
