Fig. 2. GCM and GCM2 inhibit crystal cell formation. (A-D) Side views of DoxA3 expression in stage 11 (A,B), or 15 (C,D) embryos. (A,C) Wild-type embryos; (B,D) Df(2L)200 embryos. (E,F) Higher magnification views of DoxA3-expressing cells located in the crystal cell cluster in a wild-type embryo (E), or located ectopically in a Df(2L)200 embryo (F). (G) Side views of DoxA3 expression in a lz^R1;Df(2L)200 mutant embryo at stage 15. (H,I) Side views of stage 17 embryos carrying the Bc¹ mutation that induces spontaneous melanisation of the crystal cells. (H) Bc¹, (I) Bc¹,Df(2L)200. (J-P) Side views of DoxA3 expression in stage 15 embryos. (Q-S) Side views of Pxn expression in stage 15 embryos. Genotypes as indicated in the lower part of each panel.