A truncated form of adrenomedullin; induces nitric oxide-dependent relaxation of and inhibits release of angiotensin II and endothelin-1 from isolated rat aorta; decreases MAP in spontaneously and renal hypertensive rats; reverses U-46619-induced increases in lobar arterial pressure in cats (10-3,000 ng per animal); potentiates inflammatory edema and neutrophil accumulation in rats