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Science 31 May 1963:
Vol. 140. no. 3570, p. 1000
DOI: 10.1126/science.140.3570.1000
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Articles

Ribosomes: A Common Structural Feature

Robert Langridge 1

1 Children's Cancer Research Foundation, Children's Hospital Medical Center, and Harvard Medical School, Boston, Massachusetts

A reflection between 45 and 50 Å has been observed in x-ray diffraction patterns from ribosomes extracted from Escherichia coli, Drosophila larvae, rat liver, and rabbit reticulocytes. This spacing appears to correspond to a common substructural feature within the ribosomes. The intensity distribution is consistent with a model in which part of the RNA is in the form of four or five parallel double helices 45 to 50 Å apart.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)