Localization of radioactively labelled serotonin in the nucleus of adrenal medulla cells

摘要

After treatment of rats with 3H-5-hydroxytryptophan, grains indicating the presence of serotonin could be demonstrated in the adrenal medulla. In the beginning, the label is mainly found in the cytoplasm, later, more and more it appears in the nucleus, primarily above the heterochromatin.