Figure 5.
Cyclin D3 and cdk4 selectively interact with phosphorylated p27kip1 in vivo. 2D gel analysis shows that cyclin D3 and cdk4 (A) but not cdk6 (B) selectively interact with p27kip1 isoforms 5 to 8 in BL40 cells (A). Western blot shows the expression level of cyclin D3 in Cal51 and BL40 cells detected by the anti–cyclin D3 antibody DCS-22 (B).