Using "Directed Evolution" to Isolate Specific Gene Variant Critical for Reactions in Biodesulfurization Process Energy BioSystems Corporation (Nasdaq:ENBC) presented findings today that validate the approach to improve the enzyme that is the prime reaction determinant in a bacterial strain critical for removing sulfur from petrochemical products. These key findings in the biodesulfurization field were presented by Dr. Philip Pienkos of Energy BioSystems at the 100th General Meeting of the American Society for Microbiology in Los Angeles, California.