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Fig. 7. Long microfilament bundles parallel the equatorial shear. A
parthenogenetically activated egg treated with BDM/nocodazole observed to be
undergoing torsion (A) was fixed and stained with rhodamine-phalloidin
and examined via confocal microscopy (B). Bundles of cortical
microfilaments parallel the direction of shear in the equatorial region. The
region indicated by the colorized box is shown at higher magnification
(C). A small post-fixation tear in the surface (dark spot) reveals
relatively little organized f-actin beneath the cortex. Scale bar in C: 30
µm.