I have seen diagrams for representing binding sites of proteins to DNA which shows 2 bases either side of the target site, with the vertical axis split into 4 different areas, A/C/T/G. The size of these letters corresponds to the ratio of that base in that position.
A couple of different papers had very similar diagrams which leads to be believe there is probably some tool to generate these? Does anyone know what it is? I couldn't find it referenced in the papers.