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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:000000650 | SMAD family member 2 isoform Long phosphorylated 1 | | |  | | |
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| PR:000025934 | SMAD family member 2 isoform Long phosphorylated 1 (human) | | |  | | |
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| PR:000025942 | SMAD family member 2 isoform Long phosphorylated 1 (mouse) | | |  | | |
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| PR:000000574 | SMAD family member 2 isoform Long phosphorylated form | | |  | | |
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| PR:000000650 | SMAD family member 2 isoform Long phosphorylated 1 | | |  | | |
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| PR:000025934 | SMAD family member 2 isoform Long phosphorylated 1 (human) | | |  | | |
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| PR:000025942 | SMAD family member 2 isoform Long phosphorylated 1 (mouse) | | |  | | |