Zhisheng Wang1a, Xingang Xu1a, Hungjen Liu2, Zhaocai Li1, Li Ding1, Gaoshui Yu1, Dan Xu1 and Dewen Tong1*
1College of Veterinary Medicine, Northwest A and F University, Yangling, Shaanxi 712100, P.R. China.
2Institute of Molecular Biology, National Chung Hsing University, Taichung 402, Taiwan.
