Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, United States of America.|Department of Education, Stanford University, Stanford, CA, United States of America.|Department of Physics, Stanford University, Stanford, CA, United States of America.|Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, United States of America.|Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, United States of America.|Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, United States of America.