Fig. 6. Transverse and longitudinal sections reveal the organization of the actin filaments in ellipsoids of CT-myc cells. (A) Note regular inclusion in cytoplasm revealing square packed and hexagonally packed organizations. (B) Higher magnification of the lower right region of the ellipsoid in A. (C) Longitudinal section of 10 nm filaments in an inclusion. (D) Cross-section of square packed filaments. Bar, 0.5 µm (A); 0.1 µm (B); 50 nm (C,D).