Genes classified in multiple clusters. (a) CG17052 is expressed in the ring gland as well as a number of epithelial structures at stage 14. It belongs to two clusters: 17R, the ring gland (r.g.); and 6R, the late epithelial pattern with trachea (tr.). (b) CG15118 is expressed specifically in Bolwig's organ (b.o.), along with broad staining in the brain, ventral nerve cord, anal pad, hindgut, and faintly throughout the embryo. It is classified as belonging to a broad cluster, 1B, as well as the Bolwig's organ cluster, 21R. (c-f) Fas3 has a complex expression pattern and is annotated with 27 individual annotation terms. At stage 12, it is expressed in various epithelia, including the clypeolabrum PR (clyp.PR) (c) and dorsal epidermis primordium (dorsi.epi.PR) (d), the visceral muscle PR (e) and the brain PR (not shown). At stage 15, Fas-3 is expressed in the central nervous system, including the midline, along with visceral muscle and various epithelial structures, including the trachea, hindgut, foregut, clypeolabrum, and epidermis (epi) (f). Fas-3 belongs to three clusters: 7R, the early epithelial pattern; 19R, visceral muscle; and 14R, the midline/CNS cluster.