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Prealbumin is a serum protein usually occurring at 200-400mg/L serum. Prealbumin migrates faster than albumin in acidic starch gels and include alpha 1 antitrypsin, thyroxine binding prealbumin, and orosomucoid, an alpha 1 acid glycoprotein. The functions of prealbumin are to transport thyroxine, a task it shares with thyroxine binding globulin, retinol binding protein and vitamin A. Polymorphism of prealbumin is known in the mouse and pig.
