John Kuriyan is Professor of Molecular and Cell Biology and of Chemistry at the University of California, Berkeley. He began his career at Rockefeller University, New York and has been an Investigator of the Howard Hughes Medical Institute since 1990. His laboratory uses x-ray crystallography to determine the three-dimensional structures of proteins involved in signaling and replication, as well as biochemical, biophysical, and computational analyses to elucidate mechanisms. Kuriyan was elected to the US National Academy of Sciences in 2001.