RAG2 PHD finger couples histone H3 lysine 4 trimethylation with V(D)J recombination NATURE Matthews, A. G., Kuo, A. J., Ramon-Maiques, S., Han, S., Champagne, K. S., Ivanov, D., Gallardo, M., Carney, D., Cheung, P., Ciccone, D. N., Walter, K. L., Utz, P. J., Shi, Y., Kutateladze, T. G., Yang, W., Gozani, O., Oettinger, M. A. 2007; 450 (7172): 1106-U18