Exhibit 10.21 CONFIDENTIALITY & NONCOMPETITION AGREEMENT CONFIDENTIALITY & NONCOMPETITION AGREEMENT (this "Agreement"), made and entered into as of November 16, 1999 (the "Effective Date"), by and between GENAISSANCE PHARMACEUTICALS, INC. (the...Confidentiality & Noncompetition Agreement • April 20th, 2000 • Genaissance Pharmaceuticals Inc
