Hence, we generated single-cell-derived clonal AF (AF-F5) and c-kit-positive AF (AF-c-kit, Figure 2(A)) cell populations and found a similar RNA expression profile for CX43 and CX45 (Figure 2(B)) and protein expression for CX43 (Figure 2(C), (a–d)). Here, GJA1 is linked to atrial fibrillation.