SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Patrick Plewman, president and chief executive officer of diaDexus, will provide a corporate overview and highlight the commercial opportunity for the PLAC® test at the BIO InvestorForum 2006 at the Palace Hotel in San Francisco, Wednesday, Oct. 18, 2006. The presentation is scheduled for 11:40 a.m. PDT.