Kosan Biosciences Inc., of Hayward, Calif., appointed Pieter Timmermans senior vice president, preclinical development.

Nereus Pharmaceuticals Inc., of San Diego, appointed Andrew Dorr chief medical officer and senior vice president of clinical development and regulatory affairs.

Peregrine Pharmaceuticals Inc., of Tustin, Calif., appointed Preston Marx and Stephen Smith to its scientific resource board.

Pharmasset, of Atlanta, appointed Kurt Leutzinger chief financial officer, and Mark Meester vice president, accounting and administration.

Point Therapeutics Inc., of Boston, appointed Thomas Gajewski to its clinical advisory board.

Raven biotechnologies Inc., of South San Francisco, appointed William Rohn vice chairman.

Receptor BioLogix Inc., of South San Francisco, appointed Louis Burton vice president of process sciences.

Rigel Pharmaceuticals Inc., of South San Francisco, appointed Peter Ringrose to its board.

Rubicon Genomics Inc., of Ann Arbor, Mich., appointed James Koziarz to its board.

Serologicals Corp., of Atlanta, said its subsidiary, Celliance Corp., appointed Joe Kozma vice president, sales; Craig Brown, vice president, controller; Rick Srigley, vice president, contract services; Chris Simonsen, vice president, research and development; Jim Kramer, acting vice president, operations; Diane Miller, executive director, human resources; Attilio Baldassi, director, marketing; and Wayne Vaz, director, business development and strategic planning. The company also said that its vice president of human resources, Robert Collins, was named chairman for the Atlanta Chapter of the Society for Human Resource Management.

Southern Research Institute, of Birmingham, Ala., appointed David Rutledge chief financial officer.

Theravance Inc., of South San Francisco, appointed Michael Aguiar senior vice president and chief financial officer.

Transkaryotic Therapies Inc., of Cambridge, Mass., appointed Theresa Heggie general manager, TKT Europe.

Tripos Inc., of St. Louis, promoted Mark Allen to senior vice president and managing director for Tripos' Discovery Research business.

Vertex Pharmaceuticals Inc., of Cambridge, Mass., appointed Victor Hartmann executive vice president, strategic and corporate development.

Viragen Inc., of Plantation, Fla., appointed Nancy Speck to its board.

Voyager Pharmaceutical Corp., of Raleigh, N.C., promoted Steve Fiander and Larry Tusick vice presidents of sales and marketing, and it appointed Maynard Lichty vice president, manufacturing and technical operations.

WuXi PharmaTech, of Shanghai, China, appointed Naruhito Masai vice president of business development in Japan.