Albumin

The protein found in egg whites. Albumin is one of a group of heat-coagulating proteins that are soluble in water. Albumin is also found in blood plasma, milk, and most animal tissues, as well as vegetable tissues including peas, wheat, and soybean. In addition to coagulating (thickening) when heated, albumin coagulates, to a lesser extent, when whipped, the obvious example being the whipping of egg whites.