Picture from Drace K et al. (2009) PLoS One "Caenorhabditis elegans BAH-1 is a DUF23 protein expressed in seam cells and ...."

Figure 4. bah-1 expression in seam cells. (A) Expression of promoter-GFP fusion (Experimental Methods) in L2, L4 and early adult. (B) Immunofluorescence detection of epitope-tagged BAH-1 in two representative worms.doi:10.1371/journal.pone.0006741.g004