The anaphase-promoting complex (APC) mediates the ubiquitination and degradation of key M-phase regulators, including cyclins and the anaphase inhibitor securin. Intriguingly, securin can also inhibit the degradation of cyclin B. This competition between substrates permits the accumulation of enough cyclin to drive entry into M phase.
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http://dx.doi.org/10.1038/ncb0408-381 | DOI Listing |
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