C39D10.7 encodes a large (1185-residue) protein with 11 chitin-bindingperitrophin-A domains; C39D10.7 transcripts are enriched inhermaphrodites; like CEJ-1 and CPG-2, C39D10.7 might participate ineggshell synthesis and early embryonic development, and C39D10.7'smultiple peritrophin-A domains might enable mechanical cross-linking ofchitin; however, C39D10.7 alone has no visible function in mass RNAiassays.