| Type | MGI:General | Description | when a 6 hour light pulse is administered 22 days after placement in constant darkness, no effect on locomotor behavior in null mice is observed nor are there phase shifts or suppression of activity, whereas wild-type mice show a ~3.5 hour phase delay after a light pulse few null mutants begin activity within 0.5 hours of lights-off, and 2/17 do not become active at all, whereas all wild-type and heterozygous mice begin activity within 0.5 hours 28% of wheel-running activity of mutants is during the light phase, in contrast to 4.2 or 4.1% during light phase in wild-type or heterozygous mice |
