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Changes in levels of phosphorylated-Trk receptor protein in the amygdala after fear conditioning. A, Immunohistochemical analysis of TrkB immunoreactivity (high power) in the amygdala. B, Representative Western blots of amygdala samples probed with phosphorylated-Trk Ab. Samples were taken from animals that had been exposed to light presentations alone, shock-alone, or light-shock pairings.
