Milk Proteins Whey proteins a Not precipitated by acid but easily denatured by heat(>60c) Four Fractions: -lactoglobulins (50%, -lactalbumins(25%) serum albumin immunoglobulins a rich in sulfur-containing amino acidsMilk Proteins - Whey proteins ◼ Not precipitated by acid, but easily denatured by heat (>60C) ◼ Four Fractions: -lactoglobulins (50%), -lactalbumins (25%), serum albumin & immunoglobulins ◼ rich in sulfur-containing amino acids