Caenorhabditis elegans serotonin genes and predicted Meloidogyne incognita gene orthologs. Meloidogyne incognita–predicted orthologs were identified via BLAST analysis (BLASTP and tBLASTn). The WormBase ParaSite BLAST tool criteria followed default settings. Gene orthologs were determined using the highest scoring BLAST hit, except values ≤1,000 (or lowest single hit) and highest bit score rating. A reciprocal BLAST of the top hits confirmed C. elegans homology.