(A) hox gene expression in pectoral fin buds of Med12-deficient embryos examined by ISH at 36 hpf. Dorsal views with anterior to the top. (B) Lateral views of pectoral fins in living larvae at 76 hpf in controls or injected with 0.5 ng med12-MO alone (low-med12-MO). (C) Pectoral fin lengths in larvae injected with low-med12-MO alone or combined with low amounts of nipbl-MOs (0.05 ng nipbla-MO+0.75 ng of nipblb-MO; low-nipbla/b-MO). Medians: 410.1 µm, n = 16 (control), 382.2 µm, n = 24 (low-nipbla/b-MOs), 385.4 µm, n = 16 (low-med12-MO alone), and 341.4 µm, n = 16 (low-med12-MO+low-nipbla/b-MOs). Asterisks indicate statistical significance (p-values<0.001). (D) hox expression in larvae injected with low-med12-MO alone or combined with low nipbla/b-MO. Dorsal views, anterior to the top.