Transmission electron micrograph of longitudinal section through mouse spermatozoon showing characteristic hooked shape of sperm head and extremely compact DNA-protamine in the nucleus. Figure 117 fr...

Figures 222 (upper) and 223 (lower) from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Mitochondrial matrix granules are located within the space bounded by the inner mitocho...

Telomeres isolated from chicken erythrocyte nuclei following restriction endonuclease treatment, and imaged by transmission EM after uranyl acetate negative staining. Sample was also labeled for the t...

Telomeres isolated from chicken erythrocyte nuclei following restriction endonuclease treatment, and imaged by transmission EM after uranyl acetate negative staining. Sample was also labeled for the t...

Hamster sperm fertilizing a hamster oocyte. This scanning electron micrograph shows hamster sperm fertilizing a hamster oocyte. Fertilization was performed in vivo. Sperm are shown binding to the out...

Surface of a mouse oocyte This transmission electron micrograph shows the cortex of a mouse oocyte that was undergoing fertilization. The sample was fixed using glutaraldehyde and osmium tetroxide, em...

Rabbit psoas skeletal muscle fibers were held at constant length and rigor induced by immersion in glycerol. The fibers were quick-frozen by contact with a liquid helium- cooled copper block in a Heu...

Rabbit psoas skeletal muscle fibers were held at constant length and rigor induced by immersion in glycerol. The fibers were quick-frozen by contact with a liquid helium- cooled copper block in a Heu...

Differential response of lamellipodial actin network to latrunculin a (LA), a binder of monomeric actin. This electron micrograph of a Xenopus keratocyte)lamellipodium treated with LA (0.1 μM for 30...

Differential response of lamellipodial actin network to latrunculin a (LA). Electron micrograph of a Xenopus fibroblast lamellipodium treated with LA (0.25 μM for 10 min) reveals actin depletion fro...