Irreversible self-assembly of ovalbumin into fibrils and the resulting network rheology

C. Veerman, G. de Schiffart, L.M.C. Sagis, E. van der Linden

Research output: Contribution to journalArticleAcademicpeer-review

67 Citations (Scopus)

Abstract

The self-assembly of ovalbumin into fibrils and resulting network properties were investigated at pH 2, as a function of ionic strength. Using transmission electron microscopy (TEM), the effect of ovalbumin concentration on the contour length was determined. The contour length was increasing with increasing ovalbumin concentration. TEM micrographs were made to investigate the effect of ionic strength on the contour length. In the measured ionic strength regime (0.01–0.035 M) fibrils of approximately equal length (±200 nm) were observed. TEM micrographs showed that the contour length of the fibrils, versus time after dilution, remained constant, which indicates that the self-assembly of ovalbumin is irreversible. Using the results of rheological measurements, we observed a decreasing critical percolation concentration with increasing ionic strength. We explain this result in terms of an adjusted random contact model for charged semiflexible fibrils. Hereby, this model has now been proven to be valid for fibril networks of ß-lg, BSA and, currently, for ovalbumin.
Original languageEnglish
Pages (from-to)121-127
JournalInternational Journal of Biological Macromolecules
Volume33
Issue number1-3
DOIs
Publication statusPublished - 2003

Keywords

  • heat-induced networks
  • bovine serum-albumin
  • thermal-denaturation
  • aqueous-solutions
  • light-scattering
  • gels
  • ph
  • aggregation
  • proteins
  • microstructure

Fingerprint

Dive into the research topics of 'Irreversible self-assembly of ovalbumin into fibrils and the resulting network rheology'. Together they form a unique fingerprint.

Cite this