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. 2017 Nov 2;8:35. doi: 10.1186/s13293-017-0156-4

Fig. 1.

Fig. 1

Percentage of samples that escape X inactivation across different evolutionary strata. Each data point plots the number of samples that express both copies of a gene. Strata are organized by evolutionary time and position on the X chromosome, where S1 is the oldest stratum and S5 the youngest stratum. All genes are supported by at least five data points in the population