Hobbs, S L Transgene copy number can be positively or negatively associated with transgene expression. [electronic resource] - Plant molecular biology Jan 1993 - 17-26 p. digital Publication Type: Journal Article ISSN: 0167-4412 Standard No.: 10.1007/BF00039614 doi Subjects--Topical Terms: Agrobacterium tumefaciens--geneticsDNA, Bacterial--analysisGlucuronidase--geneticsPlants, Genetically ModifiedPlants, ToxicRNA--geneticsNicotiana--geneticsTransformation, Genetic