High Voltage Transmission EM of whole mitotic metaphase chromosomes from Chinese hamster ovary cells. This image was recorded at a specimen tilt of 55 degrees and is grouped with one taken at 49 degrees, creating a stereo pair giving an oblique 3D view of the chromosomes.
CHO cells arrested at metaphase with colcemid were treated with 67% D2O, in 0.07M phosphate buffer and squashed in 50% acetic acid. Preparations were transferred to EM grids and examined with the Wisconsin HVEM operated at 1MeV. See also: H. Ris 1981 Stereoscopic electron microscopy of chromosomes. Meth Cell Biol 22:77-96 H. Ris 1978 Preparation of chromatin and chromosomes for electron microscopy. Meth Cell Biol 18:220-246.