FMRFamides and FMRFamide-like peptides are neuropeptides. Each flp gene is expressed in a distinct set of neurons. Belongs to the FARP (FMRFamide related peptide) family. The protein was originally predicted to include a TKFQDFLRF-amide peptide, although TKFQDFLRF-amide has no effect on the activity of dissected pharyngeal myogenic muscle system.