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Updated: Jun 12, 2026

Studying Proteolysis of Cyclin B at the Single Cell Level in Whole Cell Populations
Published on: September 17, 2012
Purification of the mitotic checkpoint complex (MCC) and the anaphase promoting complex/cyclosome (APC/C) from HeLa
Abstract:
In this protocol, active anaphase promoting complex/cyclosome (APC/C) and its inhibitor, mitotic checkpoint complex (MCC), are purified from HeLa cell extracts. The two complexes are first separated by gel filtration and ion exchange chromatography. The MCC is further purified by an additional gel filtration step. The APC/C activity and the ability of MCC to inhibit the APC/C are assayed at every stage of the purification procedure by in vitro ubiquitination assays. The composition and distribution of the complexes are monitored by Western blot analysis.
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