- #1
gravenewworld
- 1,132
- 26
I have 5 different cell lines I'm testing and 2 different genes with GAPDH being used as my housekeeping gene which the mRNA for the 2 different genes are normalized to. People have told me that you can't compare the two different gene mRNA levels to each other, but can only compare the mRNA levels of the same gene across the different cell lines. I really don't understand why, is this true?