The gene and cDNA of a procine derived CNP (C-type natriuretic peptide), and a procine derived CNP precursor protein and derivatives thereof are disclosed. The proceine derivative CNP precursor is represented by the following amino acid sequence: - Met His Leu Ser Gln Leu Leu Ala Cys Ala - - Leu Leu Leu Thr Leu Leu Ser Leu Arg Pro - - Ser Glu Ala Lys Pro Gly Ala Pro Pro Lys - - Val Pro Arg Thr Pro Pro Gly Glu Glu Val - - Ala Glu Pro Gln Ala Ala Gly Gly Gly Gln - - Lys Lys Gly Asp Lys Thr Pro Gly Gly Gly - - Gly Ala Asn Leu Lys Gly Asp Arg Ser Arg - - Leu Leu Arg Asp Leu Arg Val Asp Thr Lys - - Ser Arg Ala Ala Trp Ala Arg Leu Leu His - - Glu His Pro Asn Ala Arg Lys Tyr Lys Gly - - Gly Asn Lys Lys Gly Leu Ser Lys Gly Cys - - Phe Gly Leu Lys Leu Asp Arg Ile Gly Ser - - Met Ser Gly Leu Gly Cys. - These derivatives are novel and have natriuretic and hypotensive activities.
