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Partial restriction maps and gene organization of the spiralin gene regions of S. citri GII-3, GII3-9a5, and GII3-9a2 and schematic representation of double-crossover recombination between pCL15 and the chromosome of GII3-9a5. The maps are not to scale. Thick arrows indicate the positions of primers. For abbreviations, see the legend to Fig. 1.
