Solution to problem
The present invention provides an analysis method for a glucagon-secretin family peptide in a sample, the method comprising:
a cleavage step of a peptide bond of aspartic acid of a glucagon-secretin family peptide in a sample to obtain peptide fragment;
a separation/purification step of separating and purifying the peptide fragments cleaved in the cleavage step using liquid chromatography to elect a peptide fragment, a substance to be measured, on an N-terminal glucagon-secretin family peptide; and
an analysis step of carrying out mass spectrometry to the peptide fragments separated and purified in the separation/purification step to detect the peptide fragment on the N-terminal glucagon-secretin family peptide.
问题的解决方案
本发明提供了一种样品中胰高血糖素-分泌素家族肽的分析方法,该方法包括
裂解样品中胰高血糖素-分泌素家族肽的
天冬氨酸肽键以获得肽片段;
分离/纯化步骤,使用
液相色谱法分离和纯化在裂解步骤中裂解的肽片段,以选出 N 端胰高血糖素-分泌素家族肽上的肽片段,即待测物质;以及
分析步骤:对在分离/纯化步骤中分离和纯化的肽段进行质谱分析,以检测 N 端胰高血糖素-分泌素家族肽上的肽段。