identifier: METPO:2000035
label: does not use as electron donor
definition: An OBJECT_PROPERTY asserting that an organism does *not* use a given chemical
  entity as an electron donor. The intended use is predicate + class composition at
  assertion time, e.g. `<organism> METPO:X CHEBI:18276` ("organism does not use H2
  as electron donor"). Negation companion to METPO:2000009.
definition_source: DOI:10.1146/annurev.micro.61.080706.093130
trait_category: METABOLISM
term_kind: OBJECT_PROPERTY
mapping_status: REVIEWED
parent_traits:
- METPO:2000001
synonyms:
- synonym_text: electron donor
  synonym_type: RELATED_SYNONYM
  source: metpo.owl
domain: https://w3id.org/metpo/1000525
range_: http://purl.obolibrary.org/obo/CHEBI_24431
evidence:
- reference: DOI:10.1146/annurev.micro.61.080706.093130
  snippet: electron donor
  notes: Microbial-physiology reference supports the positive form of this relation;
    the negation companion uses the same domain/range with the assertion negated at
    use-site.
curation_history:
- timestamp: '2026-05-05T01:35:46.967448+00:00'
  curator: seed_from_metpo
  action: SEEDED_FROM_METPO
  changes: imported from data/raw/metpo.owl (OBJECT_PROPERTY)
  llm_assisted: false
- timestamp: '2026-05-10T00:00:00-07:00'
  curator: codex
  action: DEPRECATED_PROPERTY_RECORD
  changes: Deprecated generic chemical-use relation carrier; later replacement should
    use more specific trait records that combine the relation with the chemical, metabolic
    role, growth condition, and positive or negative usage context.
  llm_assisted: true
- timestamp: '2026-05-16T08:50:00-07:00'
  curator: claude
  action: UNDEPRECATED_AS_COMPOSITION_PRIMITIVE
  changes: 'Restored from DEPRECATED to REVIEWED under the predicate+class composition
    pattern (intended use: <organism> + this predicate + CHEBI chemical class). Added
    DOI/PMID-backed definition, evidence, and explicit domain/range slots.'
  llm_assisted: true