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Metabolix to Conduct a Webcast of Its Third Quarter 2007 Earnings Call

October 24, 2007

Metabolix, Inc. (NASDAQ: MBLX), announced today that it will be releasing its third quarter 2007 financial results after the market close on Monday, November 5, 2007. The full text of the release will also be available on the Company's website at www.metabolix.com. Jay Kouba, 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=0000460D.

To listen to a telephonic replay of the conference call, dial toll-free 1-888-203-1112 or 1-719-457-0820 for international callers and enter passcode 3558314. The replay will be available beginning at 7:30 p.m. (Eastern) on Monday, November 5, 2007 and will last through 11:59 PM (Eastern) November 12, 2007. In addition, the webcast will be archived on the Company's website in the investor relations section.

About Metabolix
Founded in 1992, Metabolix, Inc. is an innovation driven bioscience company focused on providing sustainable solutions for the world's needs for plastics, fuels and chemicals. The Company is taking a systems approach, from gene to end product, integrating sophisticated biotechnology with advanced industrial practice. Metabolix is now developing and commercializing MirelT bioplastics, a sustainable and biodegradable alternative to petroleum based plastics. Mirel is suitable for injection molding, extrusion coating, cast film and sheet, blown film and thermoforming. Metabolix is also developing a proprietary platform technology for co-producing plastics, biofuels and chemical products in biomass energy crops such as switchgrass.

Metabolix and Archer Daniels Midland Company (ADM) are commercializing Mirel through a joint venture called Telles. The first commercial scale Mirel production plant is being constructed adjacent to ADM's wet corn mill in Clinton, Iowa. The plant is expected to begin operations in late 2008 and is designed to produce up to 110 million pounds of Mirel annually. Mirel will reduce reliance on petroleum and decrease environmental impacts relative to conventional petroleum based plastics.

For more information, please visit www.metabolix.com. (MBLX-E)

View Full Press Release (PDF)

Contact:

Investors:
Kathleen Heaney
Integrated Corporate Relations
(203) 803-3585
kheaney@icrinc.com