Expression of reporter constructs in the male. Lateral views and all images are oriented such that posterior is left and dorsal is up. Images in (A–C) were inverted to obtain this orientation. (A–C) aex-3::UNC-18::YFP expression in the male. Nomarski (A), fluorescence (B), and merged (C) images. Slightly higher magnification than images in (D–I). Although aex-3 unc-18::YFP is expressed in the ventral cord, in (A–C) we focused on the plane that best showed the gonad expression. (D–F) acr-2::YFP expression in the male. Nomarski (D), fluorescence (E) and merged (F) images. (G–I) acr-5::YFP expression in the male. Nomarski (G), fluorescence (H), and merged (I) images. Animals shown are pha-1(e2123ts) young adult males transformed with the extrachromosomal array pha-1+ reporter::YFP.