Metabolix To Exhibit At The 7th Annual European Bioplastics Conference And Feature Its MveraTM B5008 Compostable-Certified Film Grade

Metabolix, Inc. (NASDAQ: MBLX), an innovation-driven bioscience company focused on delivering sustainable solutions for plastics, chemicals and energy, today announced that it will be an exhibitor at the 7th Annual European Bioplastics Conference, being held November 6 and 7, 2012 in Berlin, Germany. The Company will feature its Mvera ^TM B5008 compostable-certified film grade resin at the conference.

Metabolix markets Mvera ^TM compostable-certified film grade for applications including compost bags and can liners for organic waste collection, as well as shopping and retail bags that can be reused as compostable organic waste bags.

“The European market is currently leading the adoption of biobased and compostable bags and the Annual European Bioplastics Conference will showcase the latest innovations in compostable film,” said Bob Engle, vice president, commercial development of biopolymers at Metabolix. “This quarter, Metabolix will be launching Mvera ^TM B5008, a compostable-certified film grade. Mvera ^TM B5008 will be compounded in Europe for the local market and will also be widely available for customers outside of Europe.”

Metabolix will be located at table #27 at this year’s European Bioplastics Conference. The event is an opportunity for industry leaders to discuss industry trends and innovations in material and application development. To view the complete conference program, please visit: http://en.european-bioplastics.org/conference_2012/Final_Programme.pdf.

About Metabolix

Metabolix, Inc. is an innovation-driven bioscience company delivering sustainable solutions to the plastics, chemicals and energy industries. Metabolix is developing and commercializing Mirel ^TM and Mvera, ^TM a family of high-performance biopolymers which are biobased and biodegradable alternatives to many petroleum-based plastics. Metabolix’s biobased chemicals platform utilizes its novel “FAST” recovery process to enable the production of cost-effective, “drop-in” replacements for petroleum-based industrial chemicals. Metabolix is also developing a platform for co-producing plastics, chemicals and energy from crops. Metabolix has established an industry-leading intellectual property portfolio that, together with its knowledge of advanced industrial practice, provides a foundation for industry collaborations.

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

Safe Harbor for Forward-Looking Statements

This press release contains forward-looking statements which are made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The forward-looking statements in this release do not constitute guarantees of future performance. Investors are cautioned that statements in this press release which are not strictly historical statements, including, without limitation, statements regarding the planned launch of Mvera ^TM B5008, constitute forward-looking statements. Such forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from those anticipated and are detailed in Metabolix's filings with the Securities and Exchange Commission. Metabolix assumes no obligation to update any forward-looking information contained in this press release or with respect to the announcements described herein.

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