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| PR:000000038 | BMP receptor-regulated SMAD family member protein | | |  | | |
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| PR:000000571 | SMAD family member 1 isoform 1 phosphorylated form | | |  | | |
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| PR:000000570 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated form | | |  | | |
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| PR:000000648 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 | | |  | | |
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| PR:000036553 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 (human) | | |  | | |
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| PR:000000570 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated form | | |  | | |
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| PR:000000648 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 | | |  | | |
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| PR:000036553 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 (human) | | |  | | |
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| PR:000000571 | SMAD family member 1 isoform 1 phosphorylated form | | |  | | |
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| PR:000000570 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated form | | |  | | |
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    |
| PR:000000648 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 | | |  | | |
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    |
| PR:000036553 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 (human) | | |  | | |
| |
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    |
| PR:000000570 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated form | | |  | | |
 |  |  |  |  |
    |
| PR:000000648 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 | | |  | | |
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    |
| PR:000036553 | SMAD family member 1 isoform 1 phosphorylated and ubiquitinated 1 (human) | | |  | | |