Fig. 4. Filaments link spherical bodies to the inner membrane of Xenopus oocyte nuclei. (A,C) Low and high magnification, respectively, of filaments. Small diameter (12 nm) filaments (arrows in C) bridge large filaments and also connect spherical bodies to nuclear pore complexes and the inner nuclear membrane. One region in A is shown at higher magnification in C. (B) Quantification of the size distribution of intranuclear filaments (n=300 filaments).