A C-terminal fragment of adrenomedullin; reduces basal corticosterone production in a mixture of rat adrenocortical and adrenomedulllary cells; reverses adrenomedullin (1-52)-induced increases in ACTH-stimulated corticosterone production; reverses rat adrenomedullin-induced increases in regional cerebral blood flow in rats (0.5 and 5.0 μg/kg/min); has no effect on mesenteric arterial perfusion pressure in cats