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Genus	Species
Afipia	174
Astrobacterium	1
Blastobacter	14
Bradyrhizobium	9743
Nitrobacter	56
Photorhizobium	6
Rhodoplanes	39
Rhodopseudomonas	244
Rugositalea	1
Tardiphaga	64
Undibacter	3
Variibacter	3