Abstract
The multiple functional properties of egg yolk are mostly influenced by its complex protein composition. The high lipid content of egg yolk as well as the low solubility of delipidated egg yolk lipoproteins make analysis by conventional chromatographic or electrophoretic techniques a difficult task. This work describes a method to profile egg yolk proteins after delipidation with acetone using sodium dodecyl sulfate polyacrylamide gel electrophoresis on precast 8-18% T polyacrylamide gradient gels. Twenty bands were obtained for the whole egg yolk profile with molecular weights ranging between 5 and 221 kDa. The bands were identified based on their molecular weight and by comparison with isolated egg yolk subfractions. The dissociation behavior under reducing and nonreducing conditions provided additionally helpful information for identification and characterization of the yolk proteins. The method presented is very well suited for assaying the thermal sensitivity of whole yolk and its components and thus for the characterization of heat treatment processes.
| Original language | English |
|---|---|
| Pages (from-to) | 9329-9336 |
| Number of pages | 8 |
| Journal | Journal of agricultural and food chemistry |
| Volume | 53 |
| Issue number | 24 |
| DOIs | |
| State | Published - 30 Nov 2005 |
Keywords
- Egg yolk
- Protein analysis
- SDS-PAGE
- Thermal denaturation