Chai, Jijie, Jia-Wei Wu, Nieng Yan, Joan Massagué, Nikola Pavletich, and Yigong Shi. (2003) 2003. “Features of a Smad3 MH1-DNA Complex. Roles of Water and Zinc in DNA Binding”. J Biol Chem 278 (22): 20327-31. doi:10.1074/jbc.C300134200. Reference Link