Assertion: microtubule | /r/CapableOf | grow into microfabricated barrier
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text: To examine microtubule growth rates with higher resolution, we measured the variability in growth rates using a nanoscale laser tweezers assay (), which achieves a spatial resolution of < 3.5 nm at 10 Hz temporal resolution by measuring the position of microtubule-attached beads as microtubules grow into a microfabricated barrier ( Figure 2 A ).