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Sample fng mutant wing phenotypes. (A) Wild-type wing with class 0 phenotype. The wing veins are numbered. (B) fng2/fng80 wing with class 1 phenotype. Arrows point to extra vein material. (C) fng2/fngL83 wing with class 2 phenotype. The bracket marks a gap in the wing margin. (D) fng2/fngL73 wing with class 3 phenotype. (E) fng52/fngL19 wing with class 4 phenotype. (F) fngM69/fng3 wing (at 18°C) with class 5 phenotype.
