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  • Title: [X-ray diffraction in the intact isolated frog ocular lens].
    Author: Krivandin AV, L'vov IuM, Ostrovskiĭ MA, Fedorovich IB, Feĭgin LA.
    Journal: Biofizika; 1984; 29(5):873-7. PubMed ID: 6334537.
    Abstract:
    X-ray diffraction method has been applied for investigating ocular lens native tissue of the frog. X-ray diffraction patterns of intact lenses, their nuclei and cortices are similar and contain a set of concentric diffuse diffraction maxima. The most intensive of these maxima corresponding to the Bragg-spacings of 14.6, 9.1 and 4.6 A are presumably associated with intramolecular structure of lens proteins--crystallins. Intensive small-angle X-ray scattering and diffraction patterns isotropy indicates unavailability of crystallin molecule ordering or orientation in the lens. The shift of 14.6 A maximum up to 12.8 A being the result of nuclei drying shows the necessity of aqueous surrounding for these protein native structure maintenance.
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