Immunofluorescence was carried out as described in [35 (link)]. Anti-tubulin (Abcam) and anti–rat FITC (Jackson ImmunoResearch) antibodies were used at 1:250. Microscope preparations were imaged using a DM6000 microscope (Leica) equipped with a 100x/1.40 NA oil immersion objective lens, A4, L5, and TX2 filters, and a DF350 digital charge-coupled device camera (Leica). Pictures were processed with LAS AF (Leica) and ImageJ (http://rsbweb.nih.gov/ij/) software.
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