Magnetic tweezers (MTs) have become indispensable tools for gaining mechanistic insights into the behavior of DNA-processing enzymes and acquiring detailed, high-resolution data on the mechanical properties of DNA. Currently, MTs have two distinct designs: vertical and horizontal (or transverse) configurations. While the vertical design and its applications have been extensively documented, there is a noticeable gap in comprehensive information pertaining to the design details, experimental procedures, and types of studies conducted with horizontal MTs. This article aims to address this gap by providing a concise overview of the fundamental principles underlying transverse MTs. It will explore the multifaceted applications of this technique as an exceptional instrument for scrutinizing DNA and its interactions with DNA-binding proteins at the single-molecule level.

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