Figure 1.

IP₃R2 colocalizes with AC8 in guinea pig atrial myocytes. A–C: representative examples of fixed, isolated guinea pig atrial myocytes labeled for IP₃R1 (A), IP₃R2 (B), IP₃R3 (C), and negative controls (D). E: representative example of a fixed, isolated guinea pig atrial myocyte co-immunolabeled for IP₃R2 (red) and AC8 (green). F: digital zoom of the area indicated on image D. G: intensity plot to show staining intensity along the line shown in E. H: representative example of a fixed, isolated guinea pig atrial myocyte co-immunolabeled for IP₃R2 (red) and AC1 (green). I: digital zoom of the area indicated on image G. J: intensity plot to show staining intensity along the line shown in H. IP₃R1, inositol trisphosphate receptor type 1; IP₃R2, inositol trisphosphate receptor type 2; IP₃R3, inositol trisphosphate receptor type 3.