Figure 1

Representative actograms of a) WT and b) Lgals1 ^-/- type mice. Stars indicate day and time of light pulses at CT15. Clear differences in free-running period and alpha can be appreciated (see Table 1). Moreover, after light pulse at CT 15 (i.e., 3 hours after activity onset under DD), a larger phase delay can be seen in Lgals1 ^-/- mice (see Table 1 for details).