Download Egg Protein Part Pics. Eggs are a great source of protein, but just how many grams do you get from a single egg? Most of the protein in an egg is in the white part, with ovalbumin being the most prevalent in the egg white. But which brand is the best for your goals? Eggs are high in protein content and it is due to this fact that manufacturers of protein powders egg whites are considered to be the nutritionally dense part of an egg. When an egg protein is up against an air bubble, part of that protein is exposed to air and part is still in water. When an egg protein is up against an air bubble, part of that protein is exposed to air and part is still in water. Around 12.6% of the edible part of an egg is protein. Egg white contains the protein, the yolk the fat and cholesterol, though do not be afraid of the yolk. Here is the detailed breakdown of the protein levels present in various eggs d.Egg protein the white part is a clear alkaline solution contained in an egg that constitutes 50 % of protein content.