"In wild-type ~500 min embryos, PAT-6/actopaxin is polarized and located in nascent attachment complexes within the basal sarcolemma (arrow, Figure 4B1). In contrast, when we remove UNC-52/perlecan, PAT-3/integrin, UNC-112, or PAT-4/ILK, the recruitment of PAT-6/actopaxin to muscle attachments is disrupted. In the
unc-52,
pat-3, and
unc-112 mutants, PAT-6/actopaxin is located in small puncta within the muscle cell cytoplasm (small arrows, Figures 4B2-4B4). A cell nucleus (labeled "n") occasionally appears as a round, non-stained region in the center of a body wall muscle cell in these embryos... we are not able to detect any PAT-6/actopaxin in
pat-4 mutants (n > 200) (Figure 4B5). MH27 stains the hypodermal cell junctions (arrowheads) of these animals, however, confirming antibody penetration. "