We compared the accuracy of three common methods of total protein normalization. The Stain-Free method was accurate across different types/brands of western blotting membrane and for various protein loads, unlike Ponceau S and Amido Black. Normalizing to the housekeeping proteins Actin and β-Tubulin could match the accuracy of the Stain-Free method. However, compared to Actin or β-Tubulin, normalizing to the Stain-Free signal reduced variability that led to enhanced reproducibility and a reduction in the number of samples needed to obtain statistically significant results by >50%. Stain-Free normalization can enhance the reproducibility and hence the confidence in Western Blot data.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10214384PMC
http://dx.doi.org/10.1016/j.ab.2022.114840DOI Listing

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