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The impairment caused by postacquisition anisomycin is long-lasting. Freezing is shown in the conditioning context during a 12-min test session conducted 1 and 21 days after conditioning. Mice received injections of 50 mg/kg anisomycin (Ani) or saline (Sal) immediately, 2, 4, and 6 h after conditioning. Half of the mice received both the 1- and 21-day tests (Retest); the other half received only the 21-day test (Initial Test). Error bars indicate SEM.
