Fig. 1

Analysis of differentially expressed circRNA in testicular tissue of NOA patients. a Hierarchical clustering picture of all expressed circRNAs. “red color” represents high relative expression, and “green color” represents low relative expression. b Box plots show that the distributions of circRNAs in the control and NOA group samples were nearly the same after normalization. cThe scatter plots showed the variation of circRNA expression between the NOA and the control. The circRNAs in the located above the top green line and below the bottom green line indicated more than a 2.0-fold change of circRNAs. d The differentially expressed circRNAs based on the genomic origin were shown in the pie charts