Fig. 6.

TDO2 deficiency does not affect the average number of nosepokes or licks in every visit made by mice after 5 h of exploration in the free adaptation period. The average number of nosepokes or licks per diurnal visit made by WT mice was not significantly different from GKO mice in R1 and R2 (a–d). During the dark phase, a significant genotype effect comparing WT and GKO mice also was absent in both R1 and R2 in terms of the average number of nosepokes or licks per nocturnal visit (e–g). Data are mean±SEM. Mann–Whitney test. Total n=18 WT and n=17 GKO mice.