A-C. FLIM analysis of cellular NADH/NADPH levels. Fluorescence lifetimes of NAD(P) H autofluorescence in stable shControl and shMCU expressing cells were imaged. Representative images of the distribution of τbound on an intensity weighted pseudocolored scale (2.2-2.5 ns) are shown. Scale bars = 20 μm (A). Mean +/- SE of τbound (B) and relative NADH and NADPH intensities (C) calculated from equation in (Blacker et al., 2014) are shown (n=3). P-values: **p=0.01, **p=0.002, respectively. 