منابع مشابه
Cell Cycle: Who Turns the Crank?
The oscillating activity of a single CDK-cyclin fusion protein can drive the orderly progression of yeast cells through DNA replication, mitosis and cell division.
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Recent results from cryo-electron microscopy have shown that substantial structural rearrangements in both elongation factor EF-G and the ribosome occur during tRNA translocation. The observed sites of interaction between EF-G and the ribosome are consistent with molecular mimicry models for EF-G function.
متن کاملInfluence of crank length and crank-axle height on standing arm-crank (grinding) power.
OBJECTIVE To determine the optimal crank length and crank-axle height for maximum power production during standing arm cranking ("grinding"). METHODS Nine elite professional America's Cup grinders (age = 36 +/- 2 yr, body mass = 104 +/- 1 kg, body fat = 13% +/- 2%) performed eight maximal 6-s sprints on an adjustable standing arm-crank ergometer fitted with an SRM power crank. The protocol in...
متن کاملHow Cowpox Virus Turns Back Cell Defenses
Viruses follow a well-choreographed battle plan to mount an infection. First, they invade cells, then stage a takeover of its genetic and protein replication machinery. Once the virus assumes control, it forces the cell to create thousands of copies of the virus, which usually ends up killing the cell. Organisms have evolved elaborate defenses to prevent viruses from entering cells in the first...
متن کاملBush turns amber on stem cell research
In a short speech aired on national television on August 9, US President George W. Bush announced that the National Institutes of Health (NIH) will be allowed to fund work with human embryonic stem (ES) cell lines — but only if the work involves lines that were established before the president’s announcement. The decision was greeted with measured optimism by many scientists, who await further ...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2011
ISSN: 0960-9822
DOI: 10.1016/j.cub.2011.01.042