PDGFRA and liver cancer: To investigate the antibodies specific for the ectopically phosphorylated extracellular domain bound PDGFRA epitopes in live liver cancer cells, unfixed HUH7 cells were immunostained with antibodies from 1-3C-F11, 2-3C-C5, 1-4B-B10, 2-6B-D8, and 2-3B-G8 (Figures 5 and 6A).