Assertion: individual microtubule | /r/CapableOf | use unfixed preparations
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Source sentences:
text: The co-existence of growing and shrinking microtubules was verified by observations of individual microtubules using unfixed preparations, and the “rescue” event, i.e., the transition from shrinkage back to growth, was described (Horio and Hotani, 1986; Kirschner and Mitchison, 1986; Walker et al., 1988; van der Vaart et al., 2009).