[Left-helical conformation (type poly-L-proline II) of the polypeptide chain of adrenocorticotropic hormone in water].

By circular dichroism method the nature of the secondary structure of owine and bovine adrenocroticotropic hormone in water has been studied. An analysis of circular dichrosim spectra and their dependence on temperature point to a left-helical conformation (of the poly-L-proline II type) of the polypeptide chain of adrenocorticopic hormone in water.