The present invention features tobacco nicotine demethylase nucleic acid and amino acid sequences, tobacco plants and plant components containing such sequences, including tobacco plants and plant components having reduced expression or altered enzymatic activity of nicotine demethylase, methods of use of nicotine demethylase sequences to create plants having altered levels of nornicotine or N'-nitrosonornicotine ("NNN") or both relative to a control plant, as well as tobacco articles having reduced levels of nornicotine or NNN.

 
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< Allene oxide synthase and divinyl ether synthase from the cyp74-enzyme family isolated out of physcomitrella patens, the nucleotide sequences that code these synthases, and method for producing pathogen-resistant plants

< Functional plant, promoter to be used for producing the functional plant and method of using the same

> Murine genomic polynucleotide sequence encoding a G-protein coupled receptor and methods of use therefor

> Method of producing and screening antibodies produced in transgenic plants

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