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| PR:Q8UDE5 | transcription elongation factor GreA (Agrobacterium fabrum str. C58) | | |  | | |
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| PR:A5I7P5 | transcription elongation factor GreA (Clostridium botulinum A str. Hall) | | |  | | |
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| PR:P0A6W5 | transcription elongation factor GreA (Escherichia coli K-12) | | |  | | |
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| PR:Q2FXW7 | transcription elongation factor GreA (Staphylococcus aureus subsp. aureus NCTC 8325) | | |  | | |