Neuromedin-U-25:
Ligand for receptors NMUR1 and NMUR2 . Stimulates muscle contractions of specific regions of the gastrointestinal tract. In humans, NmU stimulates contractions of the ileum and urinary bladder.
Neuromedin precursor-related peptide 33:
Does not function as a ligand for either NMUR1 or NMUR2. Indirectly induces prolactin release although its potency is much lower than that of neuromedin precursor-related peptide 36.
Neuromedin precursor-related peptide 36:
Does not function as a ligand for either NMUR1 or NMUR2. Indirectly induces prolactin release from lactotroph cells in the pituitary gland, probably via the hypothalamic dopaminergic system.