Founded in 1992, EMD Lexigen Research Center develops proprietary immunocytokine and Fc-X fusion protein technologies for treatment of several diseases, such as cancer and AIDS. It works in association with its sister company, EMD Pharmaceuticals, which is a commercial pharmaceutical operation. EMD Pharmaceuticals is engaged in clinical development, manufacture and sale of medical products in the United States with operations in Durham, N.C., and Lexington, Mass. EMD Lexigen Research Center is a subsidiary of Merck KGaA, which is one of the world s oldest productive pharmaceutical companies. It has a staff of more than 33,000 employees and operates over 200 companies in nearly 50 countries. EMD Lexigen Research Center is based in Billerica, Mass.