Phosphotyrosine Detection Lysates of pervanadate-treated A431 cells were probed with Lane 1: mab 2A5 (IgG), 1g/ml Lane 2: mab 2C8 (IgG), 1g/ml Lane 3: mab 3B12 (IgG), 1g/ml Lane 4: mab 9H8 (IgG), 1g/ml Lane 5: mab 16F4 (IgG), 1g/ml Lane 6: mab 9F1 (IgG), 1g/ml