Provided are modified tobacco plants having reduced nitrate levels and tobacco products generated from the modified tobacco plants having reduced tobacco specific nitrosamines (TSNAs). Also provided are methods of reducing TSNAs in tobacco products by altering the gene expression of the nitrate assimilation pathway

Provided are modified tobacco plants having reduced nitrate levels and tobacco products generated from the modified tobacco plants having reduced tobacco specific nitrosamines (TSNAs). Also provided are methods of reducing TSNAs in tobacco products by altering the gene expression of the nitrate assimilation pathway

A plant cell comprising: (a) a polynucleotide sequence encoding a nitrate reductase polypeptide comprising a contiguous polypeptide sequence of SEQ ID NO: 5 or SEQ ID NO: 7, wherein methionine is substituted for an amino acid that reduces nitrate reductase activity in the plant cell as compared to a control plant cell; (b) a polypeptide sequence encoded by the polynucleotide sequence set forth in (a); or (c) a construct, vector or expression vector comprising the polynucleotide sequence set forth in (b).

The present application provides novel algal regulatory elements including inducible nitrate/nitrite promoter sequences and terminator sequences. The application further discloses DNA constructs comprising these novel regulatory elements, and recombinant microorganisms comprising these regulatory elements. Methods of modifying, producing, and using the regulatory elements are also disclosed. Methods disclosed in the present application are suited for inducible expressions of genes, such as a transgene or a native gene in algal species.

The present application provides novel algal regulatory elements including inducible nitrate/nitrite promoter sequences and terminator sequences. The application further discloses DNA constructs comprising these novel regulatory elements, and recombinant microorganisms comprising these regulatory elements. Methods of modifying, producing, and using the regulatory elements are also disclosed. Methods disclosed in the present application are suited for inducible expressions of genes, such as a transgene or a native gene in algal species.

The present application provides novel algal regulatory elements including inducible nitrate/nitrite promoter sequences and terminator sequences. The application further discloses DNA constructs comprising these novel regulatory elements, and recombinant microorganisms comprising these regulatory elements. Methods of modifying, producing, and using the regulatory elements are also disclosed. Methods disclosed in the present application are suited for inducible expressions of genes, such as a transgene or a native gene in algal species.

A plant cell comprising: (a) a polynucleotide sequence encoding a nitrate reductase polypeptide comprising a contiguous polypeptide sequence of SEQ ID NO: 5 or SEQ ID NO: 7, wherein methionine is substituted for an amino acid that reduces nitrate reductase activity in the plant cell as compared to a control plant cell; (b) a polypeptide sequence encoded by the polynucleotide sequence set forth in (a); or (c) a construct, vector or expression vector comprising the polynucleotide sequence set forth in (b).

Provided herein are triglyceride oil compositions enriched in ricinoleic acid. Further provided herein are methods of producing non-naturally occurring triglyceride oil compositions enriched in ricinoleic acid from non-naturally occurring microorganisms and applications thereof in a variety of end products, including, for example, polyols, polyurethane products, lubricants, personal care products, and food products.

A recombinant yeast cell functionally expressing: a) a nucleic acid sequence encoding an enzyme having NADH-dependent nitrate reductase activity and/or a nucleic acid sequence encoding an enzyme having NADH-dependent nitrite reductase activity; and b) a nucleic acid sequence encoding a protein having transketolase activity (EC 2.2.1.1), wherein the expression of the nucleic acid sequence encoding the protein having transketolase activity is under control of a promoter (the TKL promoter), which TKL promoter has an anaerobic/aerobic expression ratio for the transketolase of 2 or more.