The glycolytic activity of GAPDH in nuclear and cytoplasmic subfractions. A. The glycolytic activity of GAPDH was quantified by measuring the production of NADH at 340 nm for 5 min (μM NADH/mg protein). B. The relative GAPDH glycolytic activity. The results are expressed as the mean ± SD of 3 experiments performed in triplicate. **P < 0.01 vs. control group.