Positive Control: HeLa, 293T, A431, H1299, HeLaS3, HepG2, Molt-4, Raji, Mal19 Predicted Reactivity: Dog (100%), Pig (100%), Bovine (100%) Store product as a concentrated solution. Centrifuge briefly prior to opening the vial. MAPK1 (ERK2) is a serine/thr