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Levels of acetylcholinesterase (AChE) in hippocampal tissues of control and experimental groups of rats. Values are expressed as mean ± SEM (n = 6). Comparisons are as follows: * p ≤ 0.05, significantly different from Control; # p ≤ 0.05, significantly different from SM; + p ≤ 0.05, AlCl3 significantly different from AlCl3 + SM group.
