Transmission electron micrograph of a negatively stained preparation of ribosomes isolated from a 3-day old chick embryo that was maintained in a cold room for 24 hrs. The ribosome crystals seen in thin sections of these cells (see CIL:41041)are seen to be primarily tetramers.
See: T. Morimoto et al. 1972. Ribosome crystallization in chicken embryos. I. Isolation, characterization, and in vitro activity of ribosome tetramers. J Cell Biol 52:355-366. B. Byers 1966. Ribosome crystallization induced in chick embryo tissues by hypothermia. J Cell Biol 30:C1-6. Original 3.25 in. x 4 in. lantern slides were scanned at 600dpi
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