(A) SK-N-AS and (B) SN4741. Average residual activity of VECT was 1.8% and 2.4% of 18ALL in SK-N-AS and SN4741, respectively. One-way ANOVA Tukey, comparing with 18ALL: *p < 0.05, **p < 0.01 (n = 4–6). Darker colored bars = 18A, lighter colored bars = 18B.
LL: 6-repeat of Int8 variable number tandem repeat (VNTR) combined with 10-repeat of 3′-VNTR; SS: 5-repeat of Int8VNTR with 9-repeat of 3′-VNTR; VECT: Expression vector pGL3eBelo1.