In ([BALB x B6]F1 x BALB N4 mice, the Clock Δ19 /+ period phenotype is completely suppressed.
The reason for this difference is unclear; one possible explanation is that in Clock/Clock mutants the CLOCK protein is present but its transcriptional activity is disrupted, while in Clock −/− mice, the CLOCK protein is absent.
4. The ChIP experiments are done in Clock homozygous mice while the Clock heterozygote mice were used to test for suppressor effect of Balbc Usf1 allele.
My first reaction, as a student of politico-journalese, was to run my computer's mouse up the clock on ticktock.
In the mouse, the first clock gene identified, encodes the transcription factor CLOCK (Circadian Locomotor Output Cycles Kaput) [ 53], which dimerizes with BMAL1 (brain and muscle ARNT-like protein 1) to activate transcription.
For the quantification of bone development a total of 80 (20 per age class) female mice of the clock gene mutant animals or wild type controls were screened by radiography.
We previously reported work establishing mice lacking the clock gene D-box binding protein (DBP) as a stress-reactive genetic animal model of bipolar disorder.
Moreover, a moderate overexpression of USF1 from a transgene driven by the minimal CMV promoter in B6 mice suppressed the Clock mutant phenotype in a similar fashion as the BALB Usf1 allele.
In order to confirm the effect of sugar on the phase shifts of the mouse liver clock, the 10% sucrose present in the control AIN-93M diet was substituted with 10% glucose, 10% fructose, or 10% polydextrose (Fig. 3E).
By the time the mouse runs up the clock, it sounds like a distant second to sleep.
