Abstract
The spindle is a microtubule-based structure whose remodeling is required for partitioning the chromosomes and cytoplasm during meiosis. Characterizing microtubule behavior is fundamental to understanding how these tubulin polymers contribute to successful cell division. Here, a procedure is described for the imaging and analysis of spindle microtubule dynamics in cultures of living Drosophila melanogaster primary spermatocytes expressing tubulin tagged with enhanced green fluorescent protein. It employs time-lapse scanning confocal microscopy and the photobleaching of fiduciary marks onto fluorescently tagged microtubules. These labels are subsequently used to determine the sites and rates of kinetochore fiber growth and shrinkage during metaphase. This method can be readily applied to different microtubule populations, meiotic stages, and genetic backgrounds.
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