[Radioimmunologic assay of plasma corticotropin in the green frog, Rana esculenta L].

In the green Frog (Rana esculenta) the plasma contains a polypeptide immunologically related to human and porcine corticotropins. A radiommunoassay capable of detecting 4.10-12 g hog ACTH has been used for a direct plasma ACTH assay in the Frog. Using this method, the ACTH rate was determined both in untreated frogs and in animals under various experimental conditions.