申请人:Takeda Chemical Industries, Ltd.
公开号:US04206199A1
公开(公告)日:1980-06-03
(a) A novel glucagon fragment (15-29) of the formula: H-Asp-Ser-Arg-Arg-Ala-Gln-Asp-Phe-Val-Gln-Trp-Leu-Met-Asn-Thr-OH, (b) a novel product obtained by conjugating the glucagon fragment (15-29) with bovine serum albumin by means of glutalaldehyde, (c) a novel antibody specifically reactive to pancreatic glucagon produced by administering to a mammalian animal the product of the above (b), and (d) a novel peptide of the formula ##STR1## wherein R.sub.1 and R.sub.2 respectively mean H or radioactive I, R.sub.3 is an alkane residue having up to 4 carbon atoms which may optionally have NH.sub.2 or OH, R.sub.4 is a peptide fragment corresponding to the 1 to 5 amino acid residues ending with the 19-alanyl of pancreatic glucagon, and R.sub.5 is Met or Nle, being efficiently useful for estimation by radioimmunoassay of pancreatic glucagon levels in blood together with the antibody of the above (c).
(a) 一种新的胰高血糖素片段(15-29),化学式为:H-Asp-Ser-Arg-Arg-Ala-Gln-Asp-Phe-Val-Gln-Trp-Leu-Met-Asn-Thr-OH,(b) 一种新的产物,通过戊二醛将胰高血糖素片段(15-29)与牛血清白蛋白结合而获得,(c) 一种新的抗体,通过向哺乳动物动物注射上述(b)产物而特异性地与胰高血糖素反应,(d) 一种新的肽,化学式为##STR1## 其中,R.sub.1和R.sub.2分别表示H或放射性I,R.sub.3是一个碳原子数多达4个的烷基残基,可以选择性地具有NH.sub.2或OH,R.sub.4是与胰高血糖素19-丙氨酸末端的1至5个氨基酸残基相对应的肽片段,R.sub.5是Met或Nle,与上述(c)的抗体一起,有效地用于通过放射免疫测定估计血液中的胰高血糖素水平。