R02F2.4 encodes a protein with six chitin-binding peritrophin-A domains;R02F2.4 transcripts are enriched during oogenesis; like CEJ-1 and CPG-2,R02F2.4 might participate in eggshell synthesis and early embryonicdevelopment, and R02F2.4's multiple peritrophin-A domains might enablemechanical cross-linking of chitin; however, R02F2.4 has no obviousfunction in mass RNAi assays; while R02F2.4 is more closely similar toCPG-2 than CEJ-1, it may be less strongly expressed (since it hassubstantially fewer ESTs) and thus be less important in development.