Abstract
The mitotic spindle is a complex structure that coordinates the accurate segregation of chromosomes during cell division. To understand how the mitotic spindle operates at the molecular level, high resolution imaging is needed. Serial block face-scanning electron microscopy (SBF-SEM) is a technique that can be used to visualize the ultrastructure of entire cells, including components of the mitotic spindle such as microtubules, kinetochores, centrosomes, and chromosomes. Although transmission electron microscopy (TEM) has higher resolution, the reconstruction of large volumes using TEM and tomography is labor intensive, whereas SBF-SEM takes only days to process, image, and segment samples. SBF-SEM fills the resolution gap between light microscopy (LM) and TEM. When combined with LM, SBF-SEM provides a platform where dynamic cellular events can be selected and imaged at high resolution. Here we outline methods to use correlation and SBF-SEM to study mitotic spindle architecture in 3D with high resolution.
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