申请人:Sagami Chemical Research Center
公开号:US03972773A1
公开(公告)日:1976-08-03
A peptide having the formula: X-A-B-C-Y wherein A represents Ala., Gln., Asn., .omega.-BOC-Lys., Leu., Gly., Glu., ##EQU1## OR A represents A.sub.1 -- A.sub.2 wherein A.sub.1 represents a hydrophilic amino acid residue and A.sub.2 represents Val., Met., Leu. or Gln.; B represents Phe., Tyr., Leu., Met., Glu., Asp., Gln., Asn or Trp.; C represents Phe., Leu., Ileu., Try., Cys-SBzl., Ser-OBzl., Trp. or Met.; X represents an .alpha.-amino acid protective group; an amino acid residue having an N-terminal protective group or a peptide residue having an N-terminal protective group; Y represents a carboxyl protective group, an amino acid residue having a C-terminal protective group or a peptide residue having a C-terminal group, is produced in a process which comprises reacting a peptide having the formula X-A-B-OH with an amino acid or a peptide having the formula H-C-Y in the presence of enzyme pepsin.
该肽具有以下公式:X-A-B-C-Y,其中A代表Ala.、Gln.、Asn.、ω-BOC-Lys.、Leu.、Gly.、Glu.、##EQU1##或A代表A.sub.1 - A.sub.2,其中A.sub.1代表亲水性氨基酸残基,A.sub.2代表Val.、Met.、Leu.或Gln.;B代表Phe.、Tyr.、Leu.、Met.、Glu.、Asp.、Gln.、Asn或Trp;C代表Phe.、Leu.、Ileu.、Try.、Cys-SBzl.、Ser-OBzl.、Trp.或Met.;X代表α-氨基保护基;具有N-末端保护基的氨基酸残基或具有N-末端保护基的肽残基;Y代表羧基保护基、具有C-末端保护基的氨基酸残基或具有C-末端保护基的肽残基。该肽的制备方法包括在酶胃酶的存在下,将具有公式X-A-B-OH的肽与具有公式H-C-Y的氨基酸或肽反应。