The cell line was transfected with a series of pGL3 constructs with pTK-RL, infected with pseudotyped YU2 (2,500 cpm/ml, black columns), and subjected to dual-luciferase assays. * and # denote p<0.05 vs. uninfected control of the same pGL3 construct-transfected group or −884/+1 group (white column) as determined by ANOVA and Newman Keuls post-hoc, respectively.