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(A) Prefrontal cortex cortactin levels 3 hours following each of 5 days of CPP training. The horizontal line represents cortactin levels of naïve home cage control animals on each day. Saline subgroups: n = 4–8; Nicotine subgroups: n = 5–7; Naïve home cage control groups: n = 4–7. *P < 0.01. (B) Protein densities of representative bands from Western blots PFC tissues.
