Fig. 4. Perdurant SET cell attachment to ray 1 in the sema-1 mutant males. Male tail epidermal cells and ray precursors clusters are visualized using jam-1::gfp to mark adherens junctions (A-E). Male tail ray 1 and 2 precursor clusters are indicated (arrows). In the wild type (A), the clusters are closer together than in the smp-1 and smp-2 mutants (B). In the smp-1 and smp-2 mutants, the displaced ray 1 always remains connected to the seam syncytium (Set cell) in the adult male tail (D,E), which differs from the wild type (C).