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Fluorescence recovery after photobleaching (FRAP) experiments on the Z-bands of mature myofibrils. Myotubes were transfected with YFP-myotilin (A), YFP-alpha-actinin (B) and YFP-telethonin (C). Images shown from left to right are pre-bleach, bleach, 1, 5 and 10 minutes recovery after bleach. The arrows indicate the bleached region in the bleach frame. (Bar = 5 μm.)
