Jay Lichter, executive vice president of business development at Sequenom, has left the company, an outside company spokesperson confirmed last week. Dereck Tatman and Murlai Prahalad, who serve as directors of business development at Sequenom, have assumed his duties. In addition, Pete De Spain, manager of corporate communications at the San Diego company, has left to become manager of corporate communications at Anadys Pharmaceuticals, also of San Diego.