An extremely unstable protein, Cln3, appears to be the master switch that activates cell division in budding yeast. Cln3 concentrations only reach high enough levels to trigger the cell division process when the rate of protein synthesis outpaces the rate of cell volume increase. University of Groningen scientists, together with colleagues in Switzerland, published this discovery in the journal Nature Cell Biology on 4 November.
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Source: Phys.org