Each of the FBF-1 and FBF-2 transgenes rescued
fbf-1 fbf-2 double mutants to fertility (100%; n = 20 animals for each transgene). Rescued animals were phenotypically wild-type and FLAG-tagged FBF proteins were enriched in the distal germline, which includes the germline stem cells, consistent with their endogenous expression patterns (Lamont et al. 2004; Voronina et al. 2012). Also, their expression was essentially limited to the germline.