spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article
(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.



Fig. 6. Interior central spindles can initiate cleavage furrows in primary spermatocytes. Time-lapse sequence of a klp67A mutant during cytokinesis. 0 minutes: Image of the cell at anaphase onset. Note the characteristic rings of astral microtubules encircling the dense spindle. After dyad disjunction the interior central spindle (9 minutes; white arrowhead) undergoes anaphase B elongation causing it to buckle outwards. During this time the peripheral astral microtubules concentrate and contact the cell boundary at the equator where they initiate a primary furrow (arrows). The interior central spindle further protrudes and approaches the cell cortex in a region of diminished peripheral microtubule density (9-16 minutes; white arrowheads). As the primary furrow continues to advance (16-23 minutes; arrows), an ectopic furrow (19 minutes; black arrowhead) initiates where the interior central spindle apposes the cell membrane (white arrowhead). This ectopic furrow then ingresses towards the cell centre (21-23 minutes; black arrowheads). Time is in minutes relative to anaphase onset. Bar, 10 µm.





Right arrow Return to article