Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China;
Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China;
Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China;
Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China;
Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China;
agmatine; patch-clamp techniques; calcium channels; imidazoline receptors; α adrenergic receptors;