1. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Proteomics and Mass Spectrometry Facility, Bethesda, Maryland, USA
2. Proteome Exploration Laboratory, Beckman Institute, California Institute of Technology, 1200 E. California Blvd., MC 139-74, 91125, Pasadena, CA, USA