Improving the activity of the subtilisin nattokinase by site-directed mutagenesis and molecular dynamics simulation.2015, Meizhi Weng, Xiongwei Deng, Wei Bao, Li Zhu, Jieyuan Wu, Yongjun Cai, Yan Jia, Zhongliang Zheng, Guolin Zou*. Biochemical and Biophysical Research Communications.