the roles of microfilaments and microtubules in generating and stabilizing endocytotic and surface features of polarity ( visualized by horseradish peroxidase incubation and indirect immunofluorescence labeling , respectively ) have been evaluated by exposure of 8- and 16-cell embryos and 8-cell couplets to drugs ( cytochalasin d , colcemid , nocodazole ) that disrupt the cytoskeleton .
C0026046
microtubules
C0007634
cell