Allison, L A Deletion of rpoB reveals a second distinct transcription system in plastids of higher plants. [electronic resource] - The EMBO journal Jun 1996 - 2802-9 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. ISSN: 0261-4189 Subjects--Topical Terms: Base SequenceDNA-Directed RNA Polymerases--geneticsGene Expression Regulation, PlantMolecular Sequence DataPhotosynthesisPlants, ToxicPlastids--enzymologyPromoter Regions, GeneticRNA, Ribosomal, 16S--geneticsSequence DeletionSigma Factor--geneticsNicotiana--geneticsTranscription, Genetic