1. Dept. of Chemical Engineering; Soongsil University; Seoul 156-743 Republic of Korea
2. School of Chemical and Biological Engineering; Seoul National University; Seoul 151-742 Republic of Korea
3. Div. of Mass Spectrometry Research; Korea Basic Science Institute; Ochang 363-883 Republic of Korea
4. Dept. of Bio-Analytical Science; University of Science and Technology; Daejeon 305-764 Republic of Korea
5. Dept. of Microbial Engineering, College of Engineering; Konkuk University; Seoul 143-701 Republic of Korea
6. Dept. of Internal Medicine; Dongguk University Ilsan Hospital, College of Medicine, Dongguk University; Goyang 401-773 Si Republic of Korea
7. Dept. of Biochemistry and Molecular Biology and Cancer Research Institute; Seoul National University College of Medicine; Seoul 110-799 Republic of Korea
8. School of Chemical and Biomolecular Engineering; Pusan National University; Pusan 609-735 Republic of Korea
9. Clayton Foundations Laboratories for Peptide Biology; Salk Institute; La Jolla CA 92037