US Patent 7723097 None

The invention relates to novel bacterial strains and constructs as well as methods for production of L-amino acids, including but not limited to L-threonine. Such novel bacterial strains may be characterized by, for instance, Escherichia coli strains in which an aspartate semialdehyde dehydrogenase (asd) gene is operably associated with at least one non-native promoter, non-native ribosome binding site, or both.