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| PR:Q5SXM2 | snRNA-activating protein complex subunit 4 (human) | | |  | | |
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| PR:Q8BP86 | snRNA-activating protein complex subunit 4 (mouse) | | |  | | |
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| PR:Q8BP86-1 | snRNA-activating protein complex subunit 4 isoform m1 (mouse) | | |  | | |
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| PR:Q8BP86-2 | snRNA-activating protein complex subunit 4 isoform m2 (mouse) | | |  | | |
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| PR:Q8BP86-3 | snRNA-activating protein complex subunit 4 isoform m3 (mouse) | | |  | | |
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| PR:P91868 | snRNA-activating protein complex subunit 4 homolog (worm) | | |  | | |
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| PR:P91868-1 | snRNA-activating protein complex subunit 4 homolog isoform a (worm) | | |  | | |
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| PR:P91868-2 | snRNA-activating protein complex subunit 4 homolog isoform b (worm) | | |  | | |