IF F/

hen cells divide they must segre-gate not only their genetic mate-rial but also their cytoplasmic or-ganelles equally between two daughter cells. One organelle that continues to be the center of attention is the Golgi apparatus, which is composed of stacks of flattened membrane disks that in mammals are connected laterally to form a single ribbon (see the figure). During cell division, the Golgi is extensively fragmented, and although there has been some progress in identifying the mechanisms in-volved, there is still much we do not under-stand. In particular, it is not known how Golgi membranes undergo fragmentation during cel