Fig. 8. Organization of the coils. (A,B) Two successive 1.5 nm thick sections were produced parallel to the long axis of coil number 2. The positions of seven twines, orthogonal to the long axis of coil number 2, are indicated by arrows. (C,D) Two successive 1.5 nm thick sections performed perpendicularly to the long axis of coils numbers 1, 2 and 3. Twines (large circles) are bent and constitute closed or partially open circles. Bar, 100 nm. (E) Stereo-pair showing the twines observed in (A-D). The volume of the cluster was cut in two halves along a plane parallel to the long axis of coil number 2. To simplify the visualization, the rear part was eliminated. Several open and closed circles corresponding to bent twines can be seen.