DL-Tyrosine

CHEBI:18186 chemically defined MAPPED CHEBI CLOSE_MATCH

Ontology mapping

Primary identifier
CHEBI:18186
Ontology label
tyrosine

Evidence (1)

MANUAL_CURATION via MIM curation (#260)

Created to cover a CultureMech label MIM could not resolve (#260): ChEBI has no racemic tyrosine term — a search returns only derivatives (DL-tyrosine betaine, racemetirosine) — so the stereo-unspecified parent is the closest available, which is what the corpus's other 15 `DL-` records do (DL-aspartic acid->CHEBI:22660, DL-methionine->CHEBI:16811). Graded CLOSE_MATCH, not the EXACT those often use: the label names a racemate and the term does not distinguish stereochemistry at all, so skos:closeMatch is the honest predicate. NOT CHEBI:17895 L-tyrosine, which is what CultureMech asserts (CultureMech#276) — that silently discards the D-enantiomer.

Occurrence statistics

Total occurrences
18
Distinct media
18

Curation history

TimestampCuratorActionNew statusChanges
2026-08-15T00:00:00+00:00 add_culturemech_gap_labels CREATED_FROM_CULTUREMECH_GAP MAPPED Created to cover a CultureMech label MIM could not resolve (#260): ChEBI has no racemic tyrosine term — a search returns only derivatives (DL-tyrosine betaine, racemetirosine) — so the stereo-unspecified parent is the closest available, which is what the corpus's other 15 `DL-` records do (DL-aspartic acid->CHEBI:22660, DL-methionine->CHEBI:16811). Graded CLOSE_MATCH, not the EXACT those often use: the label names a racemate and the term does not distinguish stereochemistry at all, so skos:closeMatch is the honest predicate. NOT CHEBI:17895 L-tyrosine, which is what CultureMech asserts (CultureMech#276) — that silently discards the D-enantiomer.
2026-08-27T03:16:39.518132+00:00 refresh_occurrence_statistics CORRECTED occurrence_statistics 0/0 -> 18/18 (media_count/total_occurrences), derived from distinct CultureMech recipe ids in the #337 occurrence table. The prior values came from the importer retired in #453, whose media_count counted a list truncated to 50 examples (#449). [source=ingredient_occurrences.tsv culturemech_rev=15a4da5c08 rows=194137 distinct_recipes=15257]