Estrogen-induced activation of Cdk4 and Cdk2 during G1-S phase progression is accompanied by increased cyclin D1 expression and decreased cyclin-dependent kinase inhibitor association with cyclin E-Cdk2. - Prall,O.W.; Sarcevic,B.; Musgrove,E.A.; Watts,C.K.; Sutherland,R.L. (J Biol Chem, 1997)