Studies on pituitary polypeptide hormones. 3. The structure of α-melanocyte-stimulating hormone from pig pituitary glands

a-Melanocyte-stimulating hormone, which appears to be the major active melanocyte-stimulating substance in the pig pituitary gland (Lerner & Lee, 1955), has been shown to be a highly basic polypeptide (isoelectric point 10 5-11.0), which is readily separable from P-melanocyte-stimulating