Abstract
The specific thyroxine binding protein has been shown to migrate ahead of the serum albumin in a sharply localized band during starch gel electrophoresis, and to correspond in position to the first pre-albumin band. A considerably greater purification of thyroxine binding protein can be obtained by the method of starch gel electrophoresis than by conventional electrophoresis. The possibility is raised that the first pre-albumin band represents, in considerable part, the thyroxine binding protein.