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| PR:000039069 | ubiquitin-like modifier-activating enzyme 1 isoform 1 | | |  | | |
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| PR:P22314-1 | ubiquitin-like modifier-activating enzyme 1 isoform 1 (human) | | |  | | |
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| PR:Q02053-1 | ubiquitin-like modifier-activating enzyme 1 isoform 1 (mouse) | | |  | | |
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| PR:Q5U300-1 | ubiquitin-like modifier-activating enzyme 1 isoform 1 (rat) | | |  | | |