Abstract: A peptide is novel and useful for the bronchodilative activity and the hypotensive activity, having the following structure:His-Ser-Asp-Ala-Val-Phe-Thr-Asp-Asn-Tyr-Thr-Arg-Leu-Arg-Lys-Gln-X-Ala-Val-L ys -Lys-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-Gly-Y(wherein X is Met or Leu; and Y is OH, Lys-OH, Arg-OH, Lys-Arg-OH, or Lys-NH.sub.2 when X is Met, or Y is Lys-NH.sub.2, Lys-OH, or Lys-Arg-OH when X is Leu).

Abstract: A peptide is novel and useful for the bronchodilative activity and the hypotensive activity, having the following structure: ##STR1## (wherein X is Met or Leu; and Y is OH, Lys-OH, Arg-OH, Lys-Arg-OH, or Lys-NH.sub.2 when X is Met, or Y is Lys-NH.sub.2, Lys-OH, or Lys-Arg-OH when X is Leu).

Abstract: A novel polypeptide is defined by the below shown formula and is useful as an analgesic. ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom or a lower alkyl or lower alkenyl group, A represents a D-amino acid, Gly or Sar provided that when the D-amino acid is D-Cys, it is bonded with L-Cys or D-Cys in position 5 through a S--S bond to effect intramolecular ring closure, B represents L-Phe or D-Phe in which the benzene ring may be substituted or an .alpha.-N-alkyl derivative thereof, C represents an L-amino acid, D-Cys or an .alpha.-N-alkyl derivative thereof, D and E each represent an L- or D-basic amino acid or an .alpha.-N-alkyl derivative thereof, F represents a group of the formula --OR.sup.3 (in which R.sup.3 is H or a lower alkyl group), a group of the formula: ##STR2## (in which R.sup.4 and R.sup.5 are the same or different and each represents H or a lower alkyl group), a group of the formula: --G--OR.sup.

Abstract: A novel peptide having the primary structure: N-Me-Tyr-Gly-Gly-Phe-Leu-Arg-Arg-D.Ile-Arg-Pro-Lys-D.Leu-Lys-Trp-NH.sub.2 (in which D.Ile and D.Leu represent a D-Ile and a D-Leu residue respectively, other abbreviations of amino acids represent each an L-amino acid residue and Me represents a methyl group), which exhibits a remarkable analgesic effect when administered peripherally. A process for the preparation thereof by a solid phase method is also disclosed.

Abstract: A substance having opiate and analgesic activity is obtained from swine duodenum. The opioid substance of the present invention comprises a heptadecapeptide having the following primary amino acid structure: Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln.

Abstract: Stabilized powdery secretin preparation wherein secretin is carried on an adequate amount of alanine serving as excipient and weighing material, which is produced by lyophilization of an aqueous solution of secretin in the presence of alanine, the product being useful for therapeutic treatment of diseases and for diagnosis of disorders in digestive tracts such as pancreas and gallbladder.