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Southern hybridization of EcoRI-restricted genomic DNA of P. azotofixans and Paenibacillus sp. strains with a nifH probe (PCR product from strain ATCC 35681 generated with primers NHA1 and NHA2). The figure is a composite of two blots. Lane 1, P. durum DSMZ 1735; lane 2, P. azotofixans SD20; lane 3, BE1; lane 4, P3E20; lane 5, RCPG7; lane 6, SD17; lane 7, 2RC1; lane 8, P. macerans LMD24.3; lane 9, P. polymyxa DSMZ 356; lane 10, ATCC 35681; lane 11, F102; lane 12, C3L4; lane 13, RBN4.
