Fig. 4. Early telophase nuclear morphology. (a) Low magnification FESEM image showing bilobal morphology of a nucleus dividing into two 4 µm ‘daughters’. (b) Surface of such a nucleus showing a few early assembly intermediates (arrows) and bound membrane vesicles (stars), which could be spindle membranes. (c) TEM thin section showing reassembling NPCs. (d,e) Network of spindle envelope overlying the NE (stars) and early NPC intermediates (arrows) assembling on the NE between the spindle envelope tubules. (f-h) Thin section TEM showing fusion of spindle membrane with NE (arrows).