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The Western blot is widely used in the study of protein biochemistry, but it is notoriously labor-intensive, and it is limited in its reproducibility and quantification, among many other challenges. By contrast, capillary-based protein separation and immunodetection, known as Simple Western™, overcomes many of the challenges associated with the traditional Western blot, and it is quickly gaining traction as a replacement for traditional Western blot analysis. The advantages that capillary-based immunoassay offers include ease of use, automation, reproducibility, quantification, and even built-in total protein normalization. In this chapter, we describe protocols for the two basic types of capillary-based immunodetection assays, one by molecular weight separation and the other by charge separation. In both methods, protein samples are separated in the capillary followed seamlessly by immunodetection with chemiluminescent or fluorescent antibodies for highly sensitive and specific detection of target proteins.


Carsten Lück, Charles Haitjema, Christopher Heger. Simple Western: Bringing the Western Blot into the Twenty-First Century. Methods in molecular biology (Clifton, N.J.). 2021;2261:481-488

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PMID: 33421009

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