Fig. 2. ak mice show deficits of olfactory function. Four- to six-month-old male rd1 and ak mice performed (A) buried pellet test; (B) odor discrimination test; and (C) odor habituation/dishabituation tests. F social = familiar social, bedding from home cage; NF social = non-familiar social, bedding from a new cage. RD1 mouse showed significant habituation (less time sniffing successive same smells), and dishabituation (more time sniffing a new smell) while ak mouse did not. **p < 0.01; ***p < 0.001. Mean ± S.E.M., n = 7–10 for each group. N.S. = no significant difference.