High voltage (1MeV) transmission electron microscopy image of a 0.5 micrometer section through a Chinese hamster ovary cell at metaphase showing a chromatid pair, with kinetochores at the centromere. The image was taken with a specimen tilt of 77 degrees and is one of a group of 10 tilts from 77 degrees to 32 degrees at 5 degree intervals. Pairs of images provide oblique stereo views of the chromosome.
CHO cells at metaphase were fixed with paraformaldehyde followed by OsO4, embedded in epoxy resin and 0.5 micrometer 'thick' sections stained with uranly acetate for HVEM observation. 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.
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