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| PR:000024232 | putative xanthine dehydrogenase FAD-binding subunit XdhB | | |  | | |
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| PR:Q46800 | putative xanthine dehydrogenase FAD-binding subunit XdhB (Escherichia coli K-12) | | |  | | |
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| PR:Q46800 | putative xanthine dehydrogenase FAD-binding subunit XdhB (Escherichia coli K-12) | | |  | | |