FIGURE 4
Figure 4. Mosmo paralogs are required for head bone formation in zebrafish. (A–F) Lateral (A,C,E) and dorsal (B,D,F) views of the head of wt (A,B), mosmoa±;mosmob± (C,D) and mosmoa–/–;mosmob–/– (E,F) adult zebrafish stained with alizarin red to label bone tissue. Note the bone malformation in the frontonasal region of mosmoa–/–;mosmob–/– double mutants (E, arrow) in comparison to heterozygous and wt fish (A,C). (G) Cartoons of the craniofacial appearance of wt and mosmoa–/–;mosmob–/– adult mutants, from lateral and dorsal views, highlighting the maxillary (yellow) and premaxillary (red) bones. The number of animals analyzed for each genotype is indicated in the left bottom corner in panels (A,C,E). d, dentary; e, ethmoid; f, frontal; ia, infraorbital; k, kinethmoid; le, lateral ethmoid; mx, maxillary; n, nasal; pe, pre-ethmoid; pm, premaxillary; q, quadrate; se, supraethmoid; and so, supraorbital. Scale bar, 2 mm.