Supplementary Figure 1. Identification and annotation of circRNAs in OS and corresponding adjacent nontumor tissues. a and b: The chromosome distribution of total identified circRNAs in OS tissues (a) and corresponding adjacent nontumor tissues (b) samples, separately. Y-axis: chromosome number; X-axis: chromosome position; green: positive strands; orange: negative strands. c: Distribution of back-spliced reads after two rounds of filtering out false-positive candidate circRNAs. d: The length distribution of identified circRNAs.