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| PR:A5I4I7 | polyribonucleotide nucleotidyltransferase (Clostridium botulinum A str. Hall) | | |  | | |
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| PR:P05055 | polyribonucleotide nucleotidyltransferase (Escherichia coli K-12) | | |  | | |
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| PR:Q2FZ20 | polyribonucleotide nucleotidyltransferase (Staphylococcus aureus subsp. aureus NCTC 8325) | | |  | | |