In excitable cells, the major pathway for Ca2+ influx is via highly Ca2+-selective voltage-gated Ca2+ channels (VGCC). The original alphabetical nomenclature was replaced recently with standard numerical nomenclature: Cav1.1-1.4, Cav2.1-2.3, Cav3.1-3.3. In skeletal muscle cells, an additional
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Nowycky et al. (2002) studied this question.