by Michael Sheffield, St. Jude Children’s Research Hospital From left: Hanwen Zhu, Ph.D.; Ji Sun, Ph.D.; and Patricia Hixson, Ph.D., all of St. Jude Structural Biology, have determined the detailed structure of an enzyme whose mutated forms are known to cause Parkinson’s disease. Credit: St. Jude Children’s Research Hospital Structural biologists at St. Jude Children’s Research Hospital have determined the...