Affiliation: | a Department of Molecular and Integrative Physiology, University of Illinois and College of Medicine, 524 Burrill Hall, 407 S. Goodwin Avenue, Urbana, IL 61801-3704, USA b Department of Cell and Structural Biology, University of Illinois and College of Medicine, Urbana, IL 61801, USA c Department of Chemistry, University of Illinois, Urbana, IL 61801, USA |