1Department of Biochemistry, Chonnam National University Medical School, Gwangju 501-190, Republic of Korea, 2Laboratory of Biophysics, School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul 151-742, Republic of Korea
In the online version of the article the name of the second corresponding author is misspelled. The correct spelling is Sa-Ouk Kang.
The online version of the original article can be found under doi: 10.1007/s12275-008-0307-8