Figure 3. Iri-1 is widely expressed. (A-H) An
iri-1::gfp fusion is expressed in the intestine (Int; A and C), rectal epithelial cells (REP; A), anal sphincter (AS; B), spermatheca (Sp; C), vulval hypodermis cells (Vul; D), excretory cell (EC; E), amphid socket cells (AmSo; E), the pharyngeal neuron I3 (E), procorpus, corpus, isthmus, and terminal bulb muscles of the pharynx (Ph; E and F), and the pharyngeo-intestinal valve (PI; F). It is widely expressed in developing embryos (G) and is expressed in the gonad precursors Z1 (H) and Z4 (I). Maximal projections of serial z-sections of GFP fluorescence, overlaid with a single midsection transmission image.