activin receptor activity [GO_0017002]

{
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            "symbol": "",
            "types": [
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                "Class"
            ],
            "short_form": "GO_0017002",
            "label": "activin receptor activity"
        },
        "description": [
            "Combining with activin and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. Activin is one of two gonadal glycoproteins related to transforming growth factor beta."
        ],
        "comment": [
            "Note that this term represents an activity and not a gene product, and should only be used when the receptor binds the ligand activin. For binding to other extracellular ligands, consider annotating to terms under 'transmembrane signaling receptor activity ; GO:0004888."
        ]
    },
    "query": "Get JSON for Class",
    "version": "44725ae",
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        {
            "symbol": "",
            "iri": "http://purl.obolibrary.org/obo/GO_0004675",
            "types": [
                "Entity",
                "Class"
            ],
            "short_form": "GO_0004675",
            "label": "Activated type I receptor phosphorylates R-Smad1/5/8 directly"
        }
    ],
    "relationships": [
        {
            "relation": {
                "iri": "http://purl.obolibrary.org/obo/BFO_0000050",
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                "type": "part_of"
            },
            "object": {
                "symbol": "",
                "iri": "http://purl.obolibrary.org/obo/GO_0032924",
                "types": [
                    "Entity",
                    "Class"
                ],
                "short_form": "GO_0032924",
                "label": "activin receptor signaling pathway"
            }
        },
        {
            "relation": {
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                "type": "has_part"
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            "object": {
                "symbol": "",
                "iri": "http://purl.obolibrary.org/obo/GO_0048185",
                "types": [
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                    "Class"
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                "short_form": "GO_0048185",
                "label": "activin binding"
            }
        }
    ],
    "xrefs": [],
    "anatomy_channel_image": [],
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        {
            "synonym": {
                "scope": "has_exact_synonym",
                "label": "activin-activated receptor activity",
                "type": ""
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