See related story: Food Makers Changing Genes

Police officers relax near San Francisco's Moscone Center between outbursts from protesters at BIO 2004.
Kristen Philipkoski
Representatives from 39 states and 60 countries attended BIO in San Francisco in hopes of attracting companies to their geographical locations and reaping the benefits of new jobs and government grants.
Kristen Philipkoski
After adding rubbing alcohol to a filtered solution of smashed strawberries, shampoo, water and salt, attendees at BIO 2004 look for evidence of DNA strands to appear in their cups.
Debra Jones