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ABS events of circRNAs are prevalent in HCMV. (A) Schematic diagrams of two types of ABS events. (B) Alternative back-splice analysis of HCMV circRNAs. (C) Alternative back-splice circRNAs identified by RT-PCR. Breakpoints are indicated by dashed lines. Donor (green), acceptor (blue) sequences, and downstream/upstream sequences (gray) flanking the junction were aligned to the BSJ sequence.
