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| PR:Q9QLI9 | polymerase acidic protein (Influenza B virus (strain B/Lee/1940)) | | |  | | |
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| PR:Q9QLI9-1 | polymerase acidic protein isoform PA (Influenza B virus (strain B/Lee/1940)) | | |  | | |
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| PR:Q9QLI9-2 | polymerase acidic protein isoform PA-X (Influenza B virus (strain B/Lee/1940)) | | |  | | |