Before revision:  By analyzing experimentally measured kinetic rates of two seemingly similar DNA polymerases, T7 and Pol\gamma, we argue that one of them operates in the kinetic and the other in the energetic regime  .
After revision:  By analyzing experimentally measured kinetic rates of two seemingly similar DNA polymerases, T7 and Pol\gamma, we argue that one of them operates in the kinetic and the other in the energetic regime . Finally, we show how the two mechanisms can be combined in copying schemes implementing error correction through a proofreading pathway .