Normal contextual fear conditioning in gal-1-/- mice after strong training. (A) Experimental design used to fear condition (3 tone-shock pairs) WT (n = 10) and gal-1-/- (n = 12) mice. (B) Freezing during training in WT (closed circles) and gal-1-/- mice (open circles). (C) Freezing in context test in WT (black bars) vs. gal-1-/- (white bar) mice. (D) Freezing in tone test in context B (WT, closed circles; gal-1-/- mice, open circles). The tone was presented after 120 s.