1. Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
2. Department of Microbiology and Immunology, Montana State University, Bozeman, Montana 59717, United States
3. Matrivax Research and Development Corporation, Boston, Massachusetts 02118, United Sates
4. Immunity to Pulmonary Pathogens section, Laboratory of Bacteriology, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, Montana 59840, United States