ECHS1 acts as a novel HBsAg-binding protein enhancing apoptosis through the mitochondrial pathway in HepG2 cells

National Natural Science Foundation of China [30971362, 81072013]; Fundamental Research Funds for the Central Universities in China [2010111082]; Key Projects for the Technology Plan of Fujian Province in China [2009D020]; Foundations of Health Bureau of Fujian and Xiamen in China [2007CXB8, 3502z20077046]