EIF4G1 and cancer: We further evaluated the preservation of antigenicity for 6 labile phosphorylated proteins that are of special relevance to cancer biology: ERK Thr202/Tyr204, GSK3 α/β Ser21/Ser9, p38 MAPK Thr180/Tyr182, eIF4G Ser1108, Acetyl-CoA Carboxylase Ser79 and Bcl-2 Ser70 (Figure 11A (data for Bcl-2 not shown), Table S6, Text S1).