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      https://www.ias.ac.in/article/fulltext/pram/071/04/0877-0885

    • Keywords

       

      Small-angle neutron scattering; biological macromolecules; protein solution.

    • Abstract

       

      Small-angle neutron scattering (SANS) has been used to study the structural evolution of different phases in protein solution leading to crystallization, denaturation and gelation. The protein solution under crystallization mostly consists of monomers and dimers, and higher-mers are not observed as they are perhaps formed in very small numbers. The onset and the rate of crystallization strongly depend on the salt concentration. Protein denaturation on addition of surfactant occurs due to the formation of micelle-like clusters along the unfolded polypeptide chains of the protein. The structure of such protein{surfactant complex is found to be independent of the size of the micelles in their pure surfactant solutions. The structure of temperature-induced protein gels shows a fractal structure. Rheology of these gels shows a strong dependence on varying pH or protein concentration, whereas the structure of such gels is found to be similar.

    • Author Affiliations

       

      V K Aswal1 S Chodankar1 J Kohlbrecher2 R Vavrin2 A G Wagh1

      1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
      2. Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
    • Dates

       
  • Pramana – Journal of Physics | News

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