Abstract
Thermoplastic polyesters such as biologically produced poly[( R)-3-hydroxy-butyric acid], other polyhydroxyalkanoic acids and related chemosynthetic polyesters, have properties which make them valuable for many applications. In addition, these materials can be biodegraded to water and carbon dioxide. Many aerobic and anaerobic polyester-degrading microorganisms have been found in all moderate ecosystems. The microorganisms decompose the polymers by secretion of extracellular polyester depolymerases and utilize low molecular weight degradation products. This review summarizes the present knowledge on microbial extracellular polyester depolymerases.
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