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The figure comes from the paper (Fig.1): https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1000834

The x-axis represents for the dyad's location (the middle of nuclesome), while the y-axis represents for the probability of each base. For example, the red curve stands for the probability of T at each position that the range of position is from downstream 300bp to upstream 300bp. The x-axis values can be obtained from MNase-seq, could you give me some advice about y values?

Thanks for all your help. Any suggestion about this question would be greatly appreciated! Thank you so much.

Best wishes, Ashley