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Medical Term:


Pronunciation: lak′tal-byū′min

Definition: The albumin fraction of milk. It contains two proteins: α- and β-lactalbumin; the former, minor lactalbumin, interacts with galactosyl transferase to form lactose synthase, which synthesizes lactose from d-glucose and UDP-galactose in milk production; β-lactalbumin is the chief whey protein in bovine milk; α-lactalbumin is the most heat-stable of the whey proteins.