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76 X-RAY STUDIES OF NUCLEIC ACIDS
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EXPLANATION OF PLATES
PLATE 1
Fig. 1. X-ray fibre photograph of sodium thymonucleate.
Fig. 2. a, comparison between the left half of the Na thymonucleate fibre diagram and the
right half of the clupein thymonucleate fibre diagram. b, comparison between the top half
of the Na thymonucleate fibre diagram and the bottom half of the clupein thymonucleate
fibre diagram.
Fig. 3. X-ray powder photograph of a preparation of yeast nucleic acid (Kodak).
PLATE 2
Fig. 4. X-ray powder comparison photographs of an carly preparation of tobacco mosaic
virus nucleic acid (right) and a preparation of pancreas polynucleotide (left).
Fig. 5. X-ray photograph of yeast nucleic acid `glass'.
Fig. 6. X-ray powder photograph of barium thymate.
Fig. 7. Comparison between the X-ray powder photographs of Na thymonucleate (left)
and a high molecular weight preparation of the sodium salt of the nucleic acid from tobacco
mosaic virus (right).
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