Title : Calcium antagonists and calmodulin: effect of verapamil, nifedipine and diltiazem.

Pub. Date : 1983 May 20

PMID : 6307716






2 Functional Relationships(s)
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1 The effect of three calcium antagonists (verapamil, nifedipine and diltiazem) on the calcium-induced activation of phosphodiesterase (a calmodulin dependent process) was investigated. Diltiazem calmodulin 1 Homo sapiens
2 In the presence of calmodulin, phosphodiesterase activity was stimulated by calcium in the range 4 X 10(-6)-2.5 X 10(-5) M. Diltiazem (10(-6) M), verapamil (10(-6) M) and nifedipine (10(-7) and 10(-6) M) had no influence on phosphodiesterase activity in the presence or absence of calmodulin at any concentration of calcium employed. Diltiazem calmodulin 1 Homo sapiens