Probable FMRFamide-like neuropeptides (PubMed:28094002, PubMed:16377032). Binds to neuronal receptors such as dmsr-1 to promote sleep in response to cellular stress also known as stress-induced sleep (SIS) (PubMed:28094002). Plays a role in behaviors associated with SIS, acting in concert with the FMRFamide related peptide, flp-24 and neuropeptide-like protein nlp-8 (PubMed:27546573). AADGAPLIRF-amide: Inhibits muscle tension in somatic muscle (PubMed:11527423). Acts as a ligand for the npr-22 receptor in vitro (PubMed:16377032). Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). APEASPFIRF-amide: Inhibits muscle tension in somatic muscle (PubMed:9070852). Potent inhibitor of the activity of the dissected pharyngeal myogenic muscle system (PubMed:16187307). Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). Acts as a ligand for the npr-22 receptor in vitro. Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). Acts as a ligand for the npr-22 receptor in vitro. Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). Acts as a ligand for the npr-22 receptor in vitro. Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). Acts as a ligand for the npr-22 receptor in vitro. Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro (PubMed:28094002). Acts as a ligand for isoform a of the dmsr-1 G-protein coupled receptor in vitro. Expressed in the ASE sensory neurons, the DD motor neurons, the 15, M3 and M5 cholinergic pharyngeal motoneurons, and the ASG, ASK and BAG neurons. Expressed from the comma stage of embryogenesis, during all larval stages, and in low levels in adults (PubMed:9685599, PubMed:15236235). Expressed in the ALA neuron in L4 stage larvae (PubMed:27546573). The measured mass is that of either AADGAPLIRF-amide 1 or AADGAPLIRF-amide 2. Belongs to the FARP (FMRFamide related peptide) family.