Hi all, I had been transfecting 293ts using a plasmid with a CMV promoter and have recently changed to a different plasmid with a hEF1a promoter and I'm observing significant differences between these two plasmids. Do people know the relative strengths of promoters? From what I've seen I'd expect hEF1a to be a stronger promoter than CMV but am hoping to get some outside opinions on this.
Any other explanations people have for this would also be greatly appreciated.
Relative promoter strength
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