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.

Feng, Liang, Hanchi Yan, Zhuoru Wu, Nieng Yan, Zhe Wang, Philip Jeffrey, and Yigong Shi. (2007) 2007. “Structure of a Site-2 Protease Family Intramembrane Metalloprotease”. Science 318 (5856): 1608-12. doi:10.1126/science.1150755.