DNaseI footprint of a protein binding to a radiolabelled DNA fragment. Lanes GA and TC are Maxam-Gilbert chemical sequencing lanes, see DNA_sequencing. The lane labelled control is for quality control purposes and contains the DNA fragment but not treated with DNaseI.

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DNaseI footprint of a protein binding to a radiolabelled DNA fragment. Lanes GA and TC are Maxam-Gilbert chemical sequencing lanes, see DNA_sequencing. The lane labelled control is for quality control purposes and contains the DNA fragment but not treated with DNaseI.