Metabolix, Inc. to Conduct a Webcast of Its Fourth Quarter 2006 Financial Results

Business Wire, March 1, 2007

CAMBRIDGE, Mass. -- Metabolix, Inc. (NASDAQ: MBLX), announced today that it will be releasing its fourth quarter 2006 financial results after the market close on Wednesday, March 7, 2007. The full text of the release will also be available on the Company's website at www.metabolix.com. James Barber, the Company's CEO will host a conference call on the same day at 4:30 p.m. (Eastern).

The conference call will be webcast and can be accessed from the Company's website at www.metabolix.com in the investor relations section, as well as from the following link: http://viavid.net/dce.aspx?sid=00003BC2. For those who are unable to listen to the webcast live, an indexed recording of the call will be posted on the Company's website following the completion of the conference call.

To listen to a replay of the conference call, dial toll-free 1-888-203-1112 or 1-719-457-0820 for international callers and enter passcode 5490219. The replay will be available beginning at 7:30 p.m. (Eastern) on Wednesday, March 7, 2007 and will last through 11:59 PM (Eastern) March 14, 2007.

About Metabolix

Founded in 1992, Metabolix, Inc. is developing and commercializing environmentally sustainable and totally biodegradable Natural Plastic as a clean alternative to petroleum-based plastics. The Company is taking a systems approach, from gene to end product, to integrate sophisticated biotechnology with current industrial practice to produce plastics, fuels and chemicals from renewable resources. In addition to its microbial fermentation platform for production of Natural Plastic, Metabolix is also developing a proprietary platform technology for co-producing, in non-food plant crops such as switchgrass, Natural Plastic and biomass for biofuels such as ethanol and for chemical products. For more information, please visit www.metabolix.com.

(MBLX-E)