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Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis of Proteins

Cold Spring Harb Protoc. 2021-12; 
Clara L Kielkopf, William Bauer, Ina L Urbatsch
Products/Services Used Details Operation
Proteins, Expression, Isolation and Analysis … “Ready-to-use” gels with a variety of polyacrylamide concentrations, including gradient gels, are offered by many vendors (Bio-Rad, Life Technologies, GenScript, and others). Note that … Get A Quote

摘要

Most analytical electrophoreses of proteins are achieved by separation in polyacrylamide gels under conditions that ensure dissociation of proteins into individual polypeptide subunits and minimize aggregation. Most commonly, the anionic detergent sodium dodecyl sulfate (SDS) is used in combination with a reducing agent (β-mercaptoethanol or dithiothreitol) and with heating to dissociate proteins before loading onto the gel. SDS binding denatures the polypeptides and imparts a negative charge that masks their intrinsic charge. The amount of SDS bound is generally sequence-independent and proportional to molecular weight; at saturation, approximately one SDS molecule is bound per two amino acids, or ~1.4 g of... More

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