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| PR:000021519 | U2 small nuclear ribonucleoprotein A', initiator methionine removed form | | |  | | |
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| PR:000049307 | U2 small nuclear ribonucleoprotein A', initiator methionine removed form (human) | | |  | | |
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| PR:P09661 | U2 small nuclear ribonucleoprotein A' (human) | | |  | | |
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| PR:000049307 | U2 small nuclear ribonucleoprotein A', initiator methionine removed form (human) | | |  | | |
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| PR:P09661 | U2 small nuclear ribonucleoprotein A' (human) | | |  | | |
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    |
| PR:000049307 | U2 small nuclear ribonucleoprotein A', initiator methionine removed form (human) | | |  | | |