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Physical relationship of clones containing PsJN plant growth-promoting activity and schematic map of genes identified by sequence analysis. PsJN λ6 is an approximately 19-kb Sau3AI fragment in lambda GEM-11. pKK114 contains a 7.2-kb SstI fragment from PsJN λ6 cloned into pRK415. The arrows indicate the translation orientations of the genes. Restriction sites: B, BamHI; S, SstI; X, XhoI.
