MADISON - By guiding an enzyme down a new evolutionary pathway, a team of University of Wisconsin-Madison researchers has created a new form of an enzyme capable of producing a range of potential new therapeutic agents with anticancer and antibiotic properties.Writing in the current issue (Sept. 9, 2007) of the journal Nature Chemical Biology, a team of researchers from the UW-Madison School of Pharmacy describes a novel enzyme capable of changing the chemical properties of a variety of existing drugs and small molecules to make new agents to treat cancer and fight infection.