Metabolix, Inc., is a bioscience company focused on delivering sustainable solutions to the plastics and chemicals industries. It has focused on a family of biopolymers found in nature called polyhydroxyalkanoates (PHAs), which occur naturally in living organisms and are chemically similar to polyesters. It has demonstrated the production of PHAs at industrial scale to produce PHA biopolymers and PHA precursors to biobased industrial chemicals. The Company has also demonstrated the production of polyhydroxybutyrate (PHB), a subclass of PHAs, in agriculturally non-food crops. For the Company’s second platform, it is developing C4 and C3 chemicals from biobased sources, as opposed to the fossil fuels that are used to produce industrial chemicals. Its process for creating biobased industrial C4 and C3 chemicals involves engineering metabolic pathways into microbes that, in a fermentation process, produce specific PHA structures that serve as precursors for these chemicals.