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| PR:000000066 | TGF-beta receptor-regulated SMAD family member protein | | |  | | |
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| PR:000000574 | SMAD family member 2 isoform Long phosphorylated form | | |  | | |
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| PR:000000653 | SMAD family member 2 isoform Long phosphorylated 4 | | |  | | |
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| PR:000025937 | SMAD family member 2 isoform Long phosphorylated 4 (human) | | |  | | |
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| PR:000000574 | SMAD family member 2 isoform Long phosphorylated form | | |  | | |
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    |
| PR:000000653 | SMAD family member 2 isoform Long phosphorylated 4 | | |  | | |
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| PR:000025937 | SMAD family member 2 isoform Long phosphorylated 4 (human) | | |  | | |