1. Protein Engineering, Discovery Biology Management, Medicinal Chemistry, Insulin Engineering, Drug Metabolism, Pharmacology Research, and Screening & Assay Technology, Novo Nordisk A/S, Novo Nordisk Park, DK-2760 Måløv, Denmark, and Departments of Medicinal Chemistry, Computational Chemistry, and Pharmacology, Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121