Fig. 6

Relative fluorescence intensities of the recombinant vectors in the 5’-UTR of the HTR1A gene in the SK-N-SH cells. In the 5’-UTR region of the HTR1A gene, the relative fluorescence intensities of the 3 recombinant vectors were significantly different, which was similar to the trends observed with the SK-N-SH and HEK-293 cells. The relative fluorescence intensity of the − 1124 bp to − 372 bp fragment was higher than that of the − 1124 bp to + 99 bp fragment in the SK-N-SH cells but lower in the HEK-293 cells. *** p < = 0.001