Biosynthesis and molecular structure characterization of polyhydroxyalkanoates containing benzoyl group

Polyhydroxyalkanoates(PHA)with the biodegradability and biocompatibility has become one of the potential medical materials.Its application fields can be enlarged by modifying the PHA's properties.For this purpose,the PHA was synthesized by the culture of Pseudomonas putida KT2442 with phenylvaleric acid and sucrose as mixed carbon source.The molecular structure of this biomodified PHA was characterized by NMR,IR and GC.The analysis result indicates that the biomodificated PHA is medium-length PHA which contains 3-hydroxyphenylvalerate monomer,and this monomer accounts for 1.04% of the PHA chain.This will be useful reference for further PHA study.