Fig. 6.

Structural preservation of Jurkat cells processed with the rapid thin section embedding protocol using LR White (2.5 μl accelerator per ml monomer). A. View of a typical cell with the morphology of a lymphocyte. The central nucleus (n) is surrounded by a thin layer of cytoplasm with only few organelles, such as mitochondria (mi) and endosomes (e). B. Nuclear membrane (nm) with nuclear pores (np). The cytoplasm contains bundles of microfilaments (arrow). C. Mitochondria displaying their inner membrane system. D. A centriole with the typical triplet organization of microtubules (9 × 3). Bar in A = 1 μm and in B, C, D = 0.2 μm.