1. Department of Chemistry and BiochemistryUniversity of California, Los Angeles Los Angeles California 90095
2. UCLA‐DOE Institute of Genomics and Proteomics, University of California, Los Angeles Los Angeles California 90095
3. Department of Molecular Virology and MicrobiologyBaylor College of Medicine Houston Texas 77030
4. Molecular Biology Institute, University of California, Los Angeles Los Angeles California 90095