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| PR:000000066 | TGF-beta receptor-regulated SMAD family member protein | | |  | | |
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| PR:000025942 | SMAD family member 2 isoform Long phosphorylated 1 (mouse) | | |  | | |
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| PR:000036482 | SMAD family member 2 isoform Long phosphorylated and ubiquitinated form (mouse) | | |  | | |
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| PR:000036555 | SMAD family member 2 isoform Long phosphorylated and ubiquitinated 1 (mouse) | | |  | | |
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| PR:000025943 | SMAD family member 2 isoform Short phosphorylated 1 (mouse) | | |  | | |
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| PR:000025942 | SMAD family member 2 isoform Long phosphorylated 1 (mouse) | | |  | | |
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| PR:000036482 | SMAD family member 2 isoform Long phosphorylated and ubiquitinated form (mouse) | | |  | | |
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| PR:000036555 | SMAD family member 2 isoform Long phosphorylated and ubiquitinated 1 (mouse) | | |  | | |
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| PR:000025943 | SMAD family member 2 isoform Short phosphorylated 1 (mouse) | | |  | | |