Abstract
WE have recently stated that if silk II (for example, silk of the cocoon filament1) is treated with hot alkali, there appears in X-ray diagrams at the equator one reflexion of 45 A., besides some additional higher orders (silk III2). Diagrams of higher-orientated samples show that the net plane with D= 45 A. coincides with the equator reflexions (D= 9.15 and 4.57 A.), which, as is well known, represent the plane of the flat micelles. The 45-A. reflexion is much more intense and sharp than the equator reflexions of 9.15 and 4.57 A.
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References
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KRATKY, O., SCHAUENSTEIN, E., SEKORA, A. et al. Relation of the Globular to the Fibrous Form of Silk Fibroin. Nature 167, 861–862 (1951). https://doi.org/10.1038/167861a0
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DOI: https://doi.org/10.1038/167861a0
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