Afferon Corp., of Wayne, Pa., appointed to its board of directors Stuart Samuels, a senior management consultant, and Robert Easton, former president of The Wilkerson Group.

Affymetrix Inc., of Santa Clara, Calif., promoted Susan Siegel to president. Stephen Fodor will remain CEO and also will become chairman. John Diekman, formerly chairman, will be vice chairman.

Alaris Medical Inc., of San Diego, named Joegen Lyngsgaard vice president, operations.

Amylin Pharmaceuticals Inc., of San Diego, named Joann Data senior vice president, regulatory affairs and quality assurance.

Angstrom Pharmaceuticals Inc., of San Diego, appointed to its scientific board Emil Frei, physician-in-chief emeritus at the Dana Farber Cancer Institute.

Argonaut Technologies, of San Carlos, Calif., appointed Laura Lehman vice president of business development.

ArQule Inc., of Medford, Mass., elected as a non-executive director of its board Werner Cautreels, worldwide head of research and development of Solvay Pharmaceuticals.

BioChem Pharma Inc., of Laval, Quebec, named Ronald Ellis general manager and vice president of vaccine development; David Andrews, director analytical research and development; Alan Kimura, director clinical research and development; and David Mantus, director regulatory affairs. In addition, it appointed Dale Spriggs, director project planning and management, and John Tang, director process research and development.

Cell Pathways Inc., of Horsham, Pa., named Joseph Purvis vice president, clinical research, oncology

Cholestech Corp., of Hayward, Calif., named Thomas Worthy vice president, development and regulatory affairs.

Cytogen Corp., of Princeton, N.J., named to its board of directors Leslie Misrock, a senior partner at Pennie & Edmonds LLP, of New York. Cytogen recently acquired Prostagen Inc., in which Misrock was a founder, chairman and principal investor.

DNA Dynamics, of Del Mar, Calif., named Linda Randolph vice president of medical genetics and medical director.

Genencor International Inc., of Rochester, N.Y., promoted Carole Cobb to senior vice president, manufacturing and supply; Michael Arbige, senior vice president, technology; and Thomas Pekich, senior vice president, global business groups.

Genentech Inc., of South San Francisco, promoted James Panek to senior vice president, product operations, and Laura Leber to vice president, corporate communications.

Genetronics Biomedical Ltd., of San Diego, named to its board of outside scientific advisors Su Il Yum, a principal scientist for Amira Medical, of Scotts Valley, Calif. It also elected to its board of directors Felix Theeuwes, chairman and chief scientific officer at Durect Corp.

Guilford Pharmaceuticals Inc., of Baltimore, promoted Nicholas Landekic to senior vice president, corporate development and communications, and Thomas Seoh to senior vice president, general counsel and secretary.

Iomed Inc., of Salt Lake City, appointed Dinesh Patel to the position of special consultant in the area of ophthalmic drug delivery.

Ixion Biotechnology Inc., of Alachua, Fla., elected to its board of directors Bengt Agerup, heard of research and development of Q-Med AB, and Thomas Stagnaro, chairman of U.S. Biomaterials.

Metabolex Inc., of Hayward, Calif., promoted John Blume to vice president genomics; Thomas Gustafson to vice president biology; and Kenneth Kuskey to vice president medical affairs.

MGI Pharma Inc., of Minneapolis, named Lonnie Moulder executive vice president.

Organogenesis Inc., of Canton, Mass., elected to its board of directors Bernard Marden, former chairman and founder of Oakdale Foundation.

PE Corp., of Norwalk, Conn., elected to its board of directors James Tobin, president and chief executive officer of Boston Scientific Corp., of Natick, Mass.

SuperGen Inc., of San Ramon Calif., named Ronald Spair chief financial officer.

Techniclone Corp., of Tustin, Calif., named Terrence Chew vice president clinical and regulatory affairs.