Fig. 7. High magnification TEM of new plasma membranes. Left-hand panel shows a wild-type embryo. The paired plasma membranes are fairly straight, and a constant distance apart. (A-C) anillin^HP/RS-derived, slow phase embryo (the same embryo shown in Fig. 6D-F). The panels show different positions in the same embryo, all between furrow canals and the surface. (A) The paired plasma membranes are almost normal, though the distance between them is variable. (B) The membrane are still almost continuous, but they are highly distorted and electron-dense material is present on the membrane. (C) The membrane is completely vesiculated, similar to the region shown in Fig. 6F. Scale bar: 150 nm.