B. Pull-down assays of yTBP with Kap114p, Kap114p (Δ347-371) and Kap114p (Δ899-956). GST-fused yTBP (61-240) was incubated with recombinant Kap114p, Kap114p (Δ347-371) and Kap114p (Δ899-956). Unbound (S) and bound (B) samples were analyzed by SDS-PAGE and stained with Coomassie blue. C. Band intensities of Kap-βs from the SDS-PAGE gels in (B) were quantified and normalized by GST-yTBP intensity. Quantitative plots show percent Kap-βs binding on yTBP. 