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Agarose gel electrophoresis of amplified 16S rDNA digested with restriction endonuclease Alu I. From left to right: 123 bp ladder (Gibco BRL), Azospirillum brasilense Sp7, TOM, MAX1, MAX2, MAP1A, MANR, Azospirillum lipoferum BR17, CANRA, Herbaspirillum seropedicae Z67, COL, Herbaspirillum rubrisubalbicans M4, 123 bp ladder (Gibco BRL).
