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Fig. 3.

Trabeculation is unaffected in gpr126bns341 and gpr126bns342 zebrafish mutants.

(A and B) RT-qPCR analysis of relative gpr126 and gpr112a mRNA expression (to the housekeeping gene rpl13a) in WT zebrafish and heterozygous and homozygous gpr126bns341 (A) and gpr126bns342 (B) zebrafish mutants at 48 hours postfertilization (hpf). Data are means ± SD (n = 1, 2, or 3 pools of three hearts per pool). (C to E) Lateral views of 100 hpf gpr126+/+ (E), gpr126bns341/bns341 (D), and gpr126bns342/bns342 (E) zebrafish larvae. Inset panels: High-magnification views of the heart (boxed area). (F to I) Mid-sagittal confocal sections of gpr126+/+ and gpr126bns342/bns342 zebrafish hearts at 80 hpf (F and G) and 96 hpf (H and I) in larvae derived from gpr126bns342/+;Tg(kdrl:Hsa.HRAS-mCherry);Tg(myl7:EGFP-Hsa.HRAS) incrosses. (J and K) Mid-sagittal confocal sections of gpr126+/+ and gpr126bns341/bns341 zebrafish hearts at 96 hpf in larvae derived from gpr126bns341/+;Tg(myl7:EGFP-Hsa.HRAS) incrosses. Endocardial and myocardial membranes in (F) to (K) are labeled red and green, respectively. Right panels: High-magnification views of the outer curvature of the ventricular wall corresponding to the boxed areas. Arrowheads indicate emerging trabeculae. Scale bars, 25 μm. bv, bulboventricular valve; v, ventricle.

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