Wild-type and ΔFL ettRNAPII are transcriptionally active in vivo. (A) Map of chromosome 10 (chr 10) showing the location of the randomly selected C10orf28 gene. Log2 ratios of IP to input signals from RPB1, wild-type ettRPB2, and ΔFL ettRPB2 samples, and the ratio of wild-type ettRPB2 to ΔFL ettRPB2 at the orf28 gene, are shown. (B to D) Scatter plots of RPB1, Flag RPB2 WT, and Flag RPB2 ΔFL signals. The signal for each probe is plotted against those of the other probes.