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Fig. 7. Sister kinetochores are individualized in anaphase I. (A-C) Three serial sections of an anaphase I chromosome. (D-F) High magnification of kinetochores in A-C. Two outer kinetochore plates, corresponding to sister kinetochores are evident. The outer (black arrowhead) and middle electron-lucent (white arrowhead) kinetochore plates can be seen. Note that both sister kinetochores interact with microtubules. Scale bars: (A-C) 300 nm; (D-F) 150 nm.