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"other_component", "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope", "site_id": "PDB:7CRR:LIG:L:SAM:1501:.:SITE:UP:Q9BZ95:PWWP2:K", "source_role": "biological cofactor", "source_url": "https://www.rcsb.org/structure/7CRR", "structural_research_ligand": false, "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.", "verification_status": "phase5_derived_deposited_geometry" } }, "science_assay_roles": {}, "example": null, "matched_observations": [], "matched_assay_count": 0 } ] }