Patent 5534432 Issued on July 9, 1996. Estimated Expiration Date: April 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
800/298, Higher plant, seedling, plant seed, or plant part (i.e., angiosperms or gymnosperms)435/232, Lyase (4. )435/252.3, Transformants (e.g., recombinant DNA or vector or foreign or exogenous gene containing, fused bacteria, etc.)435/252.33, Escherichia (e.g., E. coli, etc.)435/419, Plant cell or cell line, per se, contains exogenous or foreign nucleic acid800/320Gramineae (e.g., barley, oats, rye, sorghum, millet, etc.)
A method for controlling and modifying biopolymer synthesis by manipulation of the genetics and enzymology of synthesis of polyhydroxybutyrate (PHB) and polyhydroxyalkanoate (PHA) polyesters at the molecular level in procaryotic and eukaryotic cells, especially plants. Examples demonstrate the isolation, characterization, and expression of the genes involved in the production of PHB and PHA polymers. Genes encoding the enzymes in the PHB and PHA synthetic pathway (beta-ketothiolase, acetoacetyl-CoA reductase and PHB polymerass or PHA polymerase) from Zoogloea ramigera strain I-16-M, Alcaligenes eutrophus, Nocardia salmonicolur, and P. olevorans were identified or isolated and expressed in a non-PHB producing organism, E. coli. Specific modifications to the polymers include variation in the chain length of the polymers and incorporation of different monomers into the polymers to produce co-polymers with different physical properties.