The igVR-1a chimera gene, GND, and JFH1 vectors were digested with the XbaI restriction enzyme (Roche, USA). For in vitro RNA transcription, mung bean nuclease catalyst was used in the degradation of single-stranded DNA and RNA (Promega, USA). In vitro RNA transcription was performed with a MEGAscript T7 kit (Ambion, Germany) according to the manufacturer’s recommendations. After DNase I treatment, RNA was used for transfection (12 (link)).