Film images of Cav3.1 α1 mRNA expression in ovariectomized oil- or E2-treated guinea pigs. Bright-field view of film autoradiograms illustrating the distribution of Cav3.1 α1 mRNA in coronal sections from rostral (a, b) to caudal (g, h) in oil-treated (a, c, e, g) and E2-treated (b, d, f, h) animals. The darker the images, the denser the mRNA expression. For abbreviations, see Figures 3 and 4.