(A) Organ-specific expression profile in adult females and males. (B) Expression of kcnh8 in the caudal fin margin (cfm) of the tail fin of adult Xiphophorus hellerii males and females, the median sector (m) and tip (t) of the sword and during caudal fin regeneration (v, ventral, m, median, d, dorsal compartment). Insert: expression in females upscaled, note the difference scale for the Y-axis. Vertical axis indicates fold change of expression normalized to brain (A), cfm, m (B). Data are represented as mean ± SEM. See also Figures S1, S6, S7.