The Air Force Office of Scientific Research (AFOSR) is continuing to receive proposals for basic research in the area of Toxic Biological Interactions. Further information about this topic may be reviewed in AFOSR Research Interest Brochure and Broad Agency Announcement 2001-1. This Brochure is open-ended until revised and should be referenced on all responses and may be found in the "Research Opportunities" portion of our web site, http://afosr.sciencewise.com/. See Numbered Note 26