Recommended positive controls: 293T, A431, HeLa, HepG2, Neuro 2A, C8D30, NIH-3T3, Raw264.7, C2C12, PC-12, Rat2, DDDDK-tagged SMAD4-transfected 293T. Predicted reactivity: Mouse (100%), Rat (100%), Pig (100%), Sheep (100%), Rhesus Monkey (100%), Bovine (1