Full-length Escherichia coli SecA Dimerizes in a Closed Conformation in Solution as Determined by Cryo-electron Microscopy

Yong Chen, Xijiang Pan, Ying Tang, Shu Quan, Phang C. Tai and Sen-Fang Sui

The Journal of Biological Chemistry 283 ( 43 ): 28783 - 28787 , 2008