STRUCTURE OF A CHROMATOPHORE FRACTION OF RHODOPSEUDOMONAS SPHEROIDES.
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Biomedical subjects
Publications and source records attributed to R LANGRIDGE.
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Three-dimensional structure of DNA from PBS2 bacteriophage, which contains uracil in place of the more usual thymine, is the same as that of "normal" DNA. The difference in secondary structure between DNA and RNA thus appears to be due to the 2'-hydroxyl group alone.
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A reflection between 45 and 50 A 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 A apart.
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