Assertion: centrosome | /r/HasSubevent | monopolar spindle formation
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Source sentences:
text: In contrast, during the first mitosis in C. elegans, aurora-A is not required for centrosome separation (Schumacher et al., 1998), although in the absence of the kinase bipolar mitotic spindles fail to assemble because centrosomes collapse together leading to monopolar spindle formation (Hannak et al., 2001).