Stimulates uterine smooth muscle contraction (By similarity). Synthetic peptide NmS-17 induces calcium mobilization in CHO cells transfected with either human FM-3/GPR66 (EC(50)=0.085 nM) or FM-4/TGR-1 (EC(50)=0.231 nM) NmU/NmS receptors. Expressed by the skin glands. Non-protonated fragment. The measured mass is of the active peptide NmS-33 generated only from isoform 6. Non-protonated fragment. The measured range is 92-124. Isoform 6 encodes peptide NmS-33, at positions 92 to 124, as a result of splicing out of an exon that encodes a processing site which generates NmS-17. Similar 33-mers and 36-mers have been isolated from human and from mouse and rat, respectively, although they do not arise by alternative splicing. Contains an active peptide, NmS-33, at positions 92-124. Belongs to the NmU family.