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Loss of Upa1 disturbs shuttling of Pab1-Gfp, as seen by the drastically decreased number of processive Pab1-Gfp signals. Video corresponds to Figure 6B (size bar = 10 μm, timescale in seconds, 150 ms exposure time, 150 frames, 6 frames/s display rate; QuickTime format, 353 kB).
