It is intended to provide a method for easily detecting a phosphopeptide (protein) in a test sample by using SDS-poly-acrylamide gel electrophoresis (SDS-PAGE) which has been employed in analyzing a protein, a polyacrylamide gel for electrophoresis to be used in the above method, a method of producing the gel and an intermediate in synthesizing the gel. The polyacrylamide gel for electrophoresis to be used in the above method has a structure represented by the following general formula (I) in at least a part of the structure thereof: (I) wherein M
2+
represents a transition metal ion; and X represents a linker.
旨在通过使用已经用于分析蛋白质的
SDS-聚
丙烯酰胺凝胶电泳(
SDS-PAGE)来提供一种在测试样本中轻松检测
磷酸化肽(蛋白质)的方法,该方法还包括用于上述方法的聚
丙烯酰胺凝胶电泳的聚
丙烯酰胺凝胶,生产该凝胶的方法以及合成该凝胶的中间体。用于上述方法的聚
丙烯酰胺凝胶电泳具有以下一般式(I)所代表的结构,至少在其结构的一部分中:(I)其中M2+代表过渡
金属离子;X代表连接剂。