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A, Behavioral design. Rats were fear conditioned or immediately shocked (Event 1) and 20 min later were tested for context fear (Event 2). B, Time course of Arc mRNA transcription and translocation from the nucleus of a cell to the cytoplasm. C, Mean (±SEM) percentage freezing during context test (Event 2). Delay-conditioned rats show significant freezing to the context compared with immediately shocked rats displaying the immediate shock deficit. **p < 0.01.
