A: 2-DE gel image of low-molecular-weight whey protein fraction separated on an immobilized pH 3-11 linear gradient strip followed by 15% SDS-PAGE. The standards were Bio-Rad low molecular weight.
B: 3D-view of β-lactoglobulin obtained using PDQuest software Version 7.1.1 (Bio-Rad Laboratories).
C: 2-DE gel image of high-molecular-weight whey protein fraction separated on an immobilized pH 3-11 linear gradient strip followed by 7.5% SDS-PAGE.