This family contains the precursor of bacterial neurotensin/neuromedin N (approximately 170 residues long). This the common precursor of two biologically active related peptides, neurotensin and neuromedin N. It undergoes tissue-specific processing leading to the formation in some tissues and cancer cell lines of large peptides ending with the neurotensin or neuromedin N sequence [1].

1: Production of recombinant large proneurotensin/neuromedin N-derived peptides and characterization of their binding and biological activity. Friry C, Feliciangeli S, Richard F, Kitabgi P, Rovere C; Biochem Biophys Res Commun 2002;290:1161-1168. PMID:11811984