Appearing contentedly amused, she is short-haired, long-waisted, long-legged, and small-breasted: a period knockout, at the age of forty-four.
Carcillo's knockout fueled a feisty period.
The possible involvement of circadian rhythm in cancer results from studies of the Period 2 knockout mouse.This mouse is prone to develop tumors after radiation.
Normal light entrainment was observed in both genotypes, yet under constant darkness the circadian period of knockout mice was shortened by ∼20 min (Fig. 1 H ). No differences were observed in the animals' phase-shift response to a 1-h light pulse delivered at CT14.
In contrast, loss of Cry1 by RNAi or mouse knockouts leads to shortened period length, while loss of Fbxl3, which targets Crys for degradation, leads to long period.
In this example, the knockout has a clearly longer period than the control.
Interestingly, our experiments showed a trend towards period lengthening in knockout liver explants with a period that was on average 41 min longer than in controls.
"The reason for the format change this year is to equalise the rest periods during the knockout stage," explains Alan Steenstrup in response to Elliot Jacobs' question (6 mins).
Which brings us back to the Winter Olympics or, more specifically, to the Olympic ice hockey tournament, where each team played the overtime periods in the knockout round with five players instead of the usual six.
Interestingly, fruit fly and mouse knockouts of the clock gene period display diel clock gene expression under natural light cycles and arrhythmic clock gene expression under constant dark conditions [33], [34], [35].
