纺锤丝

在透射电镜下观察到有细胞核膜消失，染色质变成粗颗粒状.中心粒一分为二，两中心粒之间还有纺锤丝牵引；

Under electron microscope , it was found that in some cells the nuclear membrane disappeared partly , chromatin became broadly granular and two centrioles were jointed by spindle fibers .

在减数分裂后期II，每条染色体的两个染色单体随着着丝点的分裂而彼此分开，由纺锤丝牵向两极。

During anaphase II the centromeres divide and single chromatids are drawn toward the poles , thus sister chromatids are separated .

纺锤丝毒性药物（紫杉醇／长春新碱/Nocodazole）是许多肿瘤化疗的一线药物。

Many spindle of toxic substances ( paclitaxel / vincristine / nocodazole ) is first-line drugs of tumor chemotherapy .

后期时，在纺锤丝的牵引下，姊妹染色单体分裂到两极。谷氨酰胺对隔离早期断奶仔猪的营养生理效应研究

The chromatids segregated to opposite poles at anaphase . Nutritional and Physiological Effects of Glutamine in Segregated Early Weanling Piglets