High hydrostatic pressure induced extraction and selective transfer of β-phosvitin from the egg yolk granule to plasma fractions

Food Chem. 2020 Aug 15:321:126696. doi: 10.1016/j.foodchem.2020.126696. Epub 2020 Mar 26.

Abstract

Egg yolk phosvitin is of particular interest due to its functional and biological properties. Recently, it was demonstrated that high hydrostatic pressure (HHP) (400 MPa for 5 min) induced the transfer of folic acid and phosvitin from the egg yolk granule to the plasma fraction. A granule fraction (Gin) produced by egg yolk centrifugation was pressure-treated at 400 and 600 MPa for 5 and 10 min, and centrifuged to generate granule fractions (GP1 to GP4) and plasmas (PP1 to PP4). Iron and phosphorus contents were also increased in PP1 to PP4 fractions, confirming the transfer of phosvitins from pressure-treated granule to plasma. Pressurization drastically improved phosvitin recovery in PP fractions, specifically at 600 MPa for 10 min, which had the highest value of phosvitin/100 mg of dry plasma at 33.3 ± 4.39 mg. Consequently, HHP represents an alternative approach for phosvitin transfer and recovery in the egg yolk soluble fraction.

Keywords: Egg yolk; Granule; High hydrostatic pressure; Phosvitin; Phosvitin extraction and purification; Plasma.

MeSH terms

  • Animals
  • Centrifugation
  • Chemical Fractionation
  • Chickens
  • Egg Yolk / chemistry*
  • Folic Acid / chemistry
  • Hydrostatic Pressure
  • Phosvitin / chemistry*
  • Phosvitin / isolation & purification

Substances

  • Phosvitin
  • Folic Acid