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    • 10. 发明授权
    • Kit for electroblotting polypeptides separated on an electrophoresis gel
    • 用于在电泳凝胶上分离的电印迹多肽的试剂盒
    • US06221626B1
    • 2001-04-24
    • US09107991
    • 1998-06-30
    • Willy Vincent BienvenutDenis Francois Hochstrasser
    • Willy Vincent BienvenutDenis Francois Hochstrasser
    • C12Q137
    • C12Q1/37Y10S435/81
    • Polypeptides separated on a gel are identified by cleaving the separated polypeptides with an immobilized cleaving reagent such as an enzyme, and transferring the fragments to a hydrophobic collection layer where they are analyzed. A hydrophilic membrane containing an immobilized protease such as trypsin is provided between an electrophoresis gel and a hydrophobic membrane to form an electroblotting “sandwich”. Polypeptides separated on the gel by electrophoresis are electroblotted from the gel through the hydrophilic membrane where they are cleaved by the protease into fragments, and the fragments are collected on the hydrophobic membrane where they are identified such as by MALDI-TOF MS analysis. From identification of the fragments, the polypeptide from which they came is identified. The hydrophilic membrane may be provided with functional groups to which the protease is immobilized by covalent bonding. Free residual functional groups not bound to the protease are capped to prevent their reaction with the polypeptide. The functional groups may be activated carbonyl groups, carboxylic acid groups or carboxylic acid derivative groups capable of reacting with an amino group of an enzyme. A kit for use in carrying out the electroblotting is formed containing the cleaving reagent immobilized on the hydrophilic membrane, and the hydrophobic collection layer. The immobilized cleaving reagent and hydrophobic layer may be in separate containers or in the same container.
    • 通过用固定化的切割试剂如酶切割分离的多肽来鉴定在凝胶上分离的多肽,并将片段转移到疏水性收集层,在那里进行分析。 在电泳凝胶和疏水膜之间提供含有固定化蛋白酶如胰蛋白酶的亲水膜以形成电印迹“三明治”。 通过电泳在凝胶上分离的多肽通过亲水膜从凝胶电泳印迹,在那里它们被蛋白酶切割成片段,并将片段收集在疏水膜上,例如通过MALDI-TOF MS分析。 从鉴定片段中鉴定出来自其的多肽。 亲水膜可以具有通过共价键固定蛋白酶的官能团。 不结合蛋白酶的游离残基官能团被封端以防止其与多肽的反应。 官能团可以是能够与酶的氨基反应的活化的羰基,羧酸基团或羧酸衍生物基团。 形成用于进行电印迹的试剂盒,其包含固定在亲水膜上的裂解试剂和疏水性收集层。 固定的切割试剂和疏水层可以在分开的容器中或在相同的容器中。