GFP-ΔN592 does not localize to the cytokinetic
ring. GFP-NMHC II-A is distributed throughout the cytoplasm during
prophase and metaphase (a and b) and localized to the cleavage furrow
during early telophase (c) and the midbody during late telophase (d).
ΔN592 shows a similar distribution to full-length myosin II-A during
prophase and metaphase, although forming more aggregates (e–h). Note,
however, that, unlike full-length NMHC II-A, it does not localize to
the cleavage furrow during early telophase (g) or the midbody during
late telophase (h). Transfection of HeLa cells with GFP-NMHC II-B,
which is not normally expressed in these cells, shows that similar to
full-length GFP-NMHC II-A, and in contrast to ΔN592, it localized to
the cleavage furrow during early telophase (k) and the midbody during
late telophase (i). Tubulin is detected by a
rhodamine-labeled secondary antibody (red). Bar, 5 μm.