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| PR:000000007 | TGF-beta superfamily receptor type-2 with activin receptor domain | | |  | | |
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| PR:Q13705-2 | activin receptor type-2B isoform ActR-IIBtrunc (human) | | |  | | |
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| PR:Q13705-2 | activin receptor type-2B isoform ActR-IIBtrunc (human) | | |  | | |
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| PR:Q13705-2 | activin receptor type-2B isoform ActR-IIBtrunc (human) | | |  | | |