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1,4-Dihydropyridine (DHP), an important class of calcium antagonist, inhibits the influx of extracellular Ca+2 through L-type voltage-dependent calcium channels. Three-dimensional (3D) structure of calcium channel as a receptor for 1,4-dihydropyridine is a step in understanding its mode of action. Protein structure prediction and modeling tools are becoming integral parts of the standard toolkit in biological and biomedical research.
Calcium channels in contraction of the heart. In cardiac muscle, calcium has a role for the ability to make the cardiac cell to contract. There are five types of calcium channels; L, T, N, P/Q and R types. Among them, L-type and T-type calcium channels are two major types of calcium channels in the cells of cardiac tissues (Bean, 1989).