Aurora B–dependent phosphorylation of condensin bypasses telomere nondisjunction but not dispersion. (A) Wild-type or the phosphomimetic mutant cnd2-3E cells were filmed through mitosis in the presence (Aurora inhibition, red, n = 48 control; n = 110 cnd2-3E) or absence (control, black, n = 42 control; n = 92 cnd2-3E) of 10 µM Napp1 and the number of Taz1 dots was counted according to spindle length. The data shown are from a single representative experiment out of three repeats. (B) Example of phenotypes seen in cnd2-3E ark1-as3 or cnd2-3A ark1-as3 cells treated or not with 10 µM Napp1. (C) Example of a wild-type cell control and a cnd2-3E ark1-as3 with Napp1 during mitotic progression. (D) The number of Taz1 foci (color code shown on the right) according to spindle length is analyzed from the movies shown in C. Note that in control cells (circles), telomere dispersion occurs before anaphase as opposed to cnd2-3E cells (squares) in the presence of Aurora inhibitor. Multiple cells were analyzed and display defects in telomere dispersion.