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Phosvitin extraction and phosphopeptides characterization from chicken egg yolk

  • Author / Creator
    Ren,Jiandong
  • Phosphopeptides derived from egg yolk phosvitin have been reported to exhibit various physiological functions. However, commercial use of phosvitin phosphopeptides (PPPs) has been hampered due to the lack of a simple and economic method to prepare PPPs. The purposes of this study were to develop a protocol to extract phosvitin from egg yolk, and to prepare and characterize phosphopeptides derived from enzymatic hydrolysis of phosvitin. The phosvitin prepared in this study had comparable or higher purity and recovery than previous methods. The atomic ratio of nitrogen to phosphorus (N/P) describes the density of phosphorus in peptide sequences. A lower value relates to higher density of phosphorus and high phosphorus content is preferred for bioactivities. The phosvitin hydrolysate showed comparable or lower N/P ratio than purified casein phosphopeptides. Novel phosphopeptides with high phosphorylation degree were identified. The protocols developed in this study could be used for laboratory uses and industrial scale-up. The phosphopeptides identified in this study are expected to exert multi-physiological functions and to be developed as functional food ingredients.

  • Subjects / Keywords
  • Graduation date
    2012-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3004C
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Agricultural, Food, and Nutritional Science
  • Specialization
    • Food Science and Technology
  • Supervisor / co-supervisor and their department(s)
    • Wu,Jianping (Department of Agricultural, Food and Nutritional Science)
  • Examining committee members and their departments
    • Doschak,Michael R. (Faculty of Pharmacy & Pharmaceutical Sciences)
    • Korver,Douglas (Department of Agricultural, Food and Nutritional Science)
    • Wu,Jianping (Department of Agricultural, Food and Nutritional Science)