Hormones of the Anterior Pituitary Body

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Abstract
ThyrotropinThyrotropin is a glycoprotein secreted by specific basophils of the anterior pituitary gland.128 Although it is found in all vertebrates studied, there is evidence of some species differences in its chemical composition. In the most highly purified preparations the activity has been found to be associated with several components differing from one another in electrophoretic mobility in starch gel, and in volume of elution from Chromatographic columns, but closely similar to one another in chemical composition.129 It is not known whether this heterogeneity is a consequence of minor chemical alterations sustained during extraction or whether several active compounds are . . .