Fig. 3.

mRNA expression of three Ca²⁺ channel α₁ subunits in PC12 cells. A, RT-PCR from PC12 cell total RNA with α_1A, α_1B, and α_1C primers. The PCR products were separated on a 1% agarose gel. The molecular weight standards are on theleft. B, Schematic representation of the regions of published rat α_1A, α_1B, and α_1C rbc-I sequences, which are identical to the sequences of PC12 α_1A, α_1B, and α_1CRT-PCR products, respectively. The numbers stand for the nucleotide positions in the published rat sequences.