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no individual potency rank is assigned.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"Agmatine Sulfate collection; species, compartment, exposure, co-substrates and manipulation remain explicit.","comparator":null,"unit":null,"notes":"","entity":{"slug":"agmatine-sulfate","display_name":"Agmatine Sulfate","entity_type_key":"small_molecule"}},{"dimension":"plain_language","value_text":"A shared precursor is not necessarily a transport competitor.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"OCT2 and MATE1 provide bidirectional agmatine transport. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21128598/ · DOI 10.1021/mp100180a","comparator":null,"unit":null,"notes":"","entity":null}],"evidence":[{"id":"4ed45fc4-f50c-5adc-845c-b35bfc730212","evidence_kind":"source_excerpt","locator":"Lines 52-58","start_line":52,"end_line":58,"excerpt":"## agmatine-sulfate-polyamine-competition\nA shared precursor is not necessarily a transport competitor.\nPolyamines inhibited MATE1-mediated agmatine transport, whereas L-arginine did not inhibit it in the tested system.\nModel: Human MATE1-expressing HEK293 cells.\nLimitations: The primary abstract groups the polyamine competitors; no individual potency rank is assigned.\nEvidence access: Primary abstract\nOCT2 and MATE1 provide bidirectional agmatine transport. · 2011 · https://pubmed.ncbi.nlm.nih.gov/21128598/ · DOI 10.1021/mp100180a","model_system":"Human MATE1-expressing HEK293 cells.","directness":"reported_statement","verification_status":"source_derived_draft","notes":"Original curation paraphrase; evidence access and experimental limitations specified.","relationship":"supports","weight":1.0,"link_notes":"","source":{"id":"e0426971-7d13-51c9-8354-6547b664f1cf","stable_key":"import-220adaab-10d8-5c4e-a3f5-a48700ea794d","title":"Agmatine Sulfate: transport, guanidino metabolism, ion channels and cross-nutrient mechanisms (2026-09-20)","document_type":"imported_text","citation_label":"AI-assisted research curation; primary references, access levels and experimental limitations individually identified. 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