Genic endo-siRNA in HEK293 cells. (A) Pie diagram of the different families of short RNAs found in the RNA sample. (B) Length distribution of endo-siRNAs. The length of the RNAs is given on the x-axis, the read counts are on the y-axis. (C) Relationship between the orientation of the short RNAs and their genes of origin. The reads of each gene were grouped according to their orientation and then sorted according to the number of reads. The x-axis represents the short RNA reads sorted according the orientation of the reads. The y-axis represents the read counts (logarithmic scale).