Neuronal nitric-oxide synthase deficiency impairs the long-term memory of olfactory fear learning and increases odor generalization

(A) Genotyping to the nNOS by standard PCR reveals the absence of mutant band (280 bp) in the wild-type (nNOS^+/+) and the absence of the wild-type band (117 bp) in the nNOS knockout (nNOS^−/−). (B) nNOS neurons immunolabeled in wild-type, but not knockout, mice in lateral amygdala, (C) dorsal hippocampus, (D) piriform cortex, and (E) glomerular layer in the olfactory bulb. (BLA) Basolateral amygdala, (BMA) basomedial nucleus, (Pir) piriform cortex, (Gl) glomerular layer in the olfactory bulb, (GrO) granular cell layer.