Yanzhen Bi*, Xianfeng Qiao, Zaidong Hua, Liping Zhang, Ximei Liu, Li Li, Wenjun Hua, Hongwei Xiao, Jingrong Zhou, Qingxin Wei and Xinmin Zheng*
* Corresponding authors: Yanzhen Bi biyanzhen@gmail.com - Xinmin Zheng anbit20@163.com
BMC Biotechnology 2012, 12:39 doi:10.1186/1472-6750-12-39