Ribosomes: A Common Structural Feature

See allHide authors and affiliations

Science  31 May 1963:
Vol. 140, Issue 3570, pp. 1000
DOI: 10.1126/science.140.3570.1000


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.