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Sequence alignment of P. azotofixans-specific stretches of the nifH gene with closely related nifH sequences, showing target regions used to design specific primers. Most of the Paenibacillus sp. sequences were obtained in this study; the only exception was the sequence of P. azotofixans ATCC 35681 (45). DSM, DSMZ. Dots indicate bases identical to those of the target sequence.
