M-phase inducer phosphatase 2 (CDC25B)

Tyrosine protein phosphatase which acts as a dosage-dependent inducer of mitotic progression. Required for G2/M phases of the cell cycle progression and abscission during cytokinesis in a ECT2-dependent manner.

Directly dephosphorylates CDK1 and stimulates its kinase activity. The three isoforms appear to get a different level of activity.