REDWOOD CITY, Calif., Sept. 19 /PRNewswire-FirstCall/ -- Threshold Pharmaceuticals, Inc. (Nasdaq: THLD - News), today announced that Dr. Alan Colowick has resigned as chief medical officer, effective October 13, 2006. Dr. Colowick will then become a consultant to the Company and a member of the Scientific Advisory Board. Dr. Colowick joined the Company in January 2005.
