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| PR:Q13564 | NEDD8-activating enzyme E1 regulatory subunit (human) | | |  | | |
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| PR:Q13564-2 | NEDD8-activating enzyme E1 regulatory subunit isoform h2 (human) | | |  | | |
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| PR:Q13564 | NEDD8-activating enzyme E1 regulatory subunit (human) | | |  | | |
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| PR:Q13564-2 | NEDD8-activating enzyme E1 regulatory subunit isoform h2 (human) | | |  | | |