Cytogen Corp., of Princeton, N.J., added Michael Becker as vice president, investor relations and corporate communications.

Cytomyx Ltd., of Cambridge, UK, appointed William Mason as its nonexecutive chairman.

Deltagen Inc., of Menlo Park, Calif., appointed Dan Shochat vice president of pharmaceutical development and a member of the executive management committee.

Deltagen Inc., of Menlo Park, Calif., appointed Kay Slocum vice president of human resources and a member of the executive management committee.

DNAPrint genomics Inc., of Sarasota, Fla., added Matthew Thomas as a scientist and Carrie Castillo in the public relations department.

Durect Corp., of Cupertino, Calif., promoted Dennis Fisher to vice president for medical affairs.

EmerGen Inc., of Salt Lake City, added Roger Wolf as vice president, research.

Ergo Science Corp., of Boston, elected Warren Huff and Charles Finelli to its board.

Exact Sciences Corp., of Maynard, Mass., nominated Connie Mack to its board of directors.

FeRx Inc., of San Diego, added Richard Keatinge as vice president of corporate development and Kenneth Norton as senior director of pharmaceutical development. Also, it named Todd Myers chief financial officer and promoted Scott Rudge to vice president of operations and site director of its Colorado laboratories.