PRESCOTT'S MICROBIOLOGY
PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 18, Problem 2AL
Summary Introduction

EMSA stands for electrophoretic mobility shift assay and it is the most common method used to study DNA-protein interactions. This method is also termed as a gel shift assay. This is because the DNA binding protein is added to the purified target DNA mixture and its mobility is slowed down using an agarose gel. The DNA-protein complex is found to be shifted to a higher molecular weight when compared to the DNA without the protein. Usually, the magnitude of the shift is related to the DNA-protein ratio. Thus, the largest shift would be seen when sufficient protein is added.

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