Figure 3. Basic structural features of the 4 PAAD-specific circRNAs. The structural features of (A) hsa_circRNA_0003958, (B) hsa_circRNA_0007367, (C) hsa_circRNA_0043278, and (D) hsa_circRNA_0049783 downloaded from the Cancer-Specific CircRNA Database (CSCD) are shown. The microRNA response element (MRE) is shown in red; The RNA binding protein (RBP) is shown in blue; The open reading frame (ORF) is shown in green.