RGN and infection: E143K Natal RGN i.c. infection provoked relatively higher levels of CPE and EGFP signal in HMC3 cells compared to WT Natal RGN i.c. (Figure 9A,B), which was consistent with the results of TE671 and SF268 cells infected by E143K Natal RGN i.c and SRIP in comparison with WT and N139S Natal RGN i.c.s or SRIPs.