 New research has since debunked this assumption, shedding light on cyclin A/CDK2 migration to the centrosomes in late G2.Cyclin A binds to the mitotic spindle poles in the centrosome however, the mechanism by which the complex is shuttled to the centrosome is not well understood.It is suspected that the presence of cyclin A/CDK2 at the centrosomes may confer a means of regulating the movement of cyclin B/CDK1 to the centrosome and thus the timing of mitotic events.