A peptide of the formula R-SER-LEU-PRO-SER-PRO-SER-ARG-LEU-PRO-GLY-PRO-SER-ASP-THR-PRO-ILE-LEU-PRO-G LN-OH wherein R: H or R.sub.1 -Ser-Ser-Ser-Ser-Lys-Ala-Pro-Pro-Pro group, R.sub.1 : H or R.sub.2 -R.sub.3 -Asp-Asp-Pro-Arg-Phe-Gln-Asp group, R.sub.2 : H or R.sub.4 -Asp-His-Pro-Leu-Thr group, R.sub.4 : H-R.sub.5 -Gly-Gly-Pro-Lys group, R.sub.5 : Cys or Tyr group, and R.sub.3 : Cys or S-acetamidemethyl-Cys group, or salt thereof, has utility for the preparation of antibodies for assaying human chorionic gonadotropin or as a labelling reagent.
一种肽的
化学式为R-
SER-LEU-PRO-
SER-PRO-
SER-ARG-LEU-PRO-GLY-PRO-
SER-A
SP-THR-PRO-ILE-LEU-PRO-GLN-OH,其中R:H或R.sub.1-
SEr-
SEr-
SEr-
SEr-Lys-Ala-Pro-Pro-Pro基团,R.sub.1:H或R.sub.2-R.sub.3-A
SP-A
SP-Pro-Arg-Phe-Gln-A
SP基团,R.sub.2:H或R.sub.4-A
SP-His-Pro-Leu-Thr基团,R.sub.4:H-R.sub.5-Gly-Gly-Pro-Lys基团,R.sub.5:Cys或Tyr基团,R.sub.3:Cys或S-acetamidemethyl-Cys基团,或其盐,可用于制备检测人绒毛膜
促性腺激素的
抗体或作为标记试剂。