The potential of modular design for brand new proteins that do not yet exist in the natural world are the latest in a recent series of developments toward custom-designing proteins. Scientists with the University of Washington used the Berkeley Lab Advanced Light Source (ALS) for some of their research. They collaborated with Susan Tsutakawa , Greg Hura, and Kathryn Burnett, of the Molecular Biophysics & Integrated Bioimaging Division, who work at the ALS beamline SIBYLS where some crystallography studies of repeat protein molecule structures took place.