RT Journal Article SR Electronic T1 Molecular determinants of frequency-dependence and Ca2+ potentiation of verapamil block in the pore region of Cav1.2 JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/mol.104.000893 A1 Nejmi Dilmac A1 Nathan Hilliard A1 Gregory H Hockerman YR 2004 UL http://molpharm.aspetjournals.org/content/early/2004/07/30/mol.104.000893.abstract AB