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Pressure stability of microtubule bundles. (A) Synchrotron SAXS data of various bundle types of taxol-stabilized microtubules at 25°C and atmospheric pressure. (B–E) Pressure-dependent scattering profiles of microtubule bundles induced by (B) 20 μM spermidine, (C) 5 μM spermine, (D) 10 wt % PEG 20k, and (E) 20 wt % PEG 20k. To see this figure in color, go online.
