Pf and there was a small rise in expression between 10 hpf and 22 hpf (Figure 1(b)); the highest level was achieved at 22 hpf. kcnj2-12 gene expression decreased between 36 hpf and 48 hpf and then increased to its highest level after 48 hpf; peak expression was achieved at 72 hpf. The kcnj2 expression profile may correspond to skeletal muscle development in zebrafish. At 16 hpf, somite formation i