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| PR:000000007 | TGF-beta superfamily receptor type-2 with activin receptor domain | | |  | | |
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| PR:Q13705-1 | activin receptor type-2B isoform ActR-IIB2 (human) | | |  | | |
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| PR:000036443 | activin receptor type-2B isoform ActR-IIB2 N-glycosylated and phosphorylated 1 (human) | | |  | | |
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| PR:Q13705-2 | activin receptor type-2B isoform ActR-IIBtrunc (human) | | |  | | |
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| PR:000076998 | activin receptor type-2B phosphorylated 1 (human) | | |  | | |
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| PR:000000214 | activin receptor type-2B sequence variant R40H (human) | | |  | | |
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| PR:000000215 | activin receptor type-2B sequence variant V494I (human) | | |  | | |
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| PR:000046259 | activin receptor type-2B, signal peptide removed form (human) | | |  | | |
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| PR:Q13705-1 | activin receptor type-2B isoform ActR-IIB2 (human) | | |  | | |
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| PR:000036443 | activin receptor type-2B isoform ActR-IIB2 N-glycosylated and phosphorylated 1 (human) | | |  | | |
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| PR:Q13705-2 | activin receptor type-2B isoform ActR-IIBtrunc (human) | | |  | | |
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| PR:000076998 | activin receptor type-2B phosphorylated 1 (human) | | |  | | |
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| PR:000000214 | activin receptor type-2B sequence variant R40H (human) | | |  | | |
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| PR:000000215 | activin receptor type-2B sequence variant V494I (human) | | |  | | |
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| PR:000046259 | activin receptor type-2B, signal peptide removed form (human) | | |  | | |