Figure 5.—
CycY preferentially interacts with Eip63E in Drosophila cells. Cells were cotransfected with the indicated constructs and lysed for co-affinity purification (co-AP) using IgG beads. Co-purified proteins were further detected by Western blot using anti-Myc or anti-protein A (PrA) antibody. (A) CycY interacts with Eip63E. (B) CycY interacts much more strongly with Eip63E than with Cdk2, Cdk4, or Cdc2rk. (C) Eip63E interacts much more strongly with CycY than with CycD, CycK, or CG31232 (Koko). (D) Eip63E G243A mutant interacts poorly with CycY. (E) CycY S389A mutants display decreased affinity for Eip63E.