Indeed, a solid body of evidence demonstrates with diverse laboratory techniques that GAPDH mRNA levels vary among normal cells and different malignancies, cancer cell lines, as well as cancer tissue biopsies [22,25,26,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50]. Here, GAPDH is linked to cancer.