Figure 3.
Kinetochores and poleward MT flux are required for timely centrosome separation. (A and B) Mean bipolar spindle formation time in the prometaphase pathway in siControl (n = 38)-, siMcm21R (n = 36)-, siMCAK (n = 23)-, or siMcm21R + siMCAK (n = 31)–treated cells (A) or in siControl (n = 38)-, siNuf2R (n = 40)-, siCENP-E (n = 28)–, siMCAK + siKif2A (n = 38)–, or siCLASP1 + siCLASP2 (n = 28)–treated cells (B). (C) Representative images of siControl- or siMcm21R RNA–treated cells stained with CREST antisera (to mark kinetochores) and EB1 antisera (to mark growing MT plus ends). Asterisks indicate statistically significant differences (P < 0.01 by Mann-Whitney test). Error bars represent SEM. Bar, 10 µm.