Western Blot Analysis of Metabolic Enzymes

Cell lysates were prepared and subjected to WB analysis as performed previously^{51 (link),52 (link)}. The following commercial antibodies were used: anti-β-actin (Sigma A1978), anti-PKM2 (Cell Signaling Technology 3198S), anti-PKM1 (Cell Signaling Technology 7067), anti-PKM (Abcam AB118499), anti-human specific LDHA (Cell Signaling Technology 2012S), anti-LDHB (Abcam AB75167), anti-human and rabbit LDHA (Abcam AB135396), anti-p70 S6 kinase (Cell Signaling Technology 2708T), anti-calreticulin (Cell Signaling Technology 12238T), anti-golgin (Cell Signaling Technology 13192), anti-COX IV (Proteintech 11242-1-AP), anti-GPT2 (Santa Cruz sc-398383), anti-PHGDH (Sigma HPA021241), and anti-PC (Santa Cruz sc-271493), horseradish peroxidase-conjugated secondary antibodies anti-mouse (Fisher PI31430) and anti-rabbit (Fisher PI31460). All the primary antibodies were used at a 1:500 dilution in 5% non-fat milk in TBST. Secondary antibodies were used at a 1:3000 dilution in 5% non-fat milk in TBST.