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Transcription can be regulated during initiation, elongation, and termination by an enormous variety of regulatory factors. A critical step in obtaining a mechanistic understanding of regulatory factor function is the determination of whether the regulatory factor exerts its effect through direct contact with the transcription machinery. Here I describe the application of a transcription activation-based...
This paper describes protocols for studies of structure and dynamics of DNA and protein–DNA complexes with atomic force microscopy (AFM) utilizing the surface chemistry approach. The necessary specifics for the preparation of functionalized surfaces and AFM probes with the use of silanes and silatranes, including the protocols for synthesis of silatranes are provided. The methodology of studies of...
We present a high-resolution mass spectrometric (MS) footprinting method enabling identification of contact amino acids in protein–protein complexes. The method is based on comparing surface topologies of a free protein versus its complex with the binding partner using differential accessibility of small chemical group selective modifying reagents. Subsequent MS analysis reveals the individual amino...
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