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The level of Arc, but not Zif268 or c-Fos, decreased from early development to adulthood. Densitometric western blot analyses were performed on total protein extracts of BLA obtained from rats euthanized at PN17 (white, n = 6), PN24 (gray, n = 7), or PN80 (adult; black, n = 4). Data are expressed as mean percentage ± SEM of adult rat levels. One-way ANOVA followed by Newman–Keuls post-hoc tests: (*) P < 0.05; (***) P < 0.001.
