FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult olfactory receptor neuron Or2a ID (Ontology) FBbt:00067001 (Fly Anatomy)
Definition Adult olfactory receptor neuron (ORN) that expresses Or2a (Benton et al., 2025). Its dendrite transduces signals from intermediate sensillum ai3 (Benton et al., 2025). Its axon innervates antennal lobe glomerulus DA4, bilaterally (Benton et al., 2025). It develops from an Nab precursor (Benton et al., 2025). There are around 20 of these cells on each side (Grabe et al., 2016; Benton et al., 2025).[ FlyBase:FBrf0187305 FlyBase:FBrf0224383 FlyBase:FBrf0229748 FlyBase:FBrf0233453 FlyBase:FBrf0262710 ]
Also Known As"adult ORN Or2a" ; "odorant receptor neuron Or2a" ; "ORN (Or2a)" (for all, see Synonyms field below)
CommentOlfactory stimulus unknown (Benton et al., 2025).
Links to External Ontologies
VFB:FBbt_00067001
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 Alleles Genes Insertions Constructs
 adult olfactory receptor neuron Or2a (all annotations which use CV term, excluding "NOT" statements)
     adult olfactory receptor neuron Or2a | somatic clone
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eo neuron
 |__antennal olfactory receptor neuron of intermediate sensillum__
adult antennal olfactory receptor neuron                          |
 |__antennal olfactory receptor neuron of intermediate sensillum__|
adult antennal lobe receptor neuron                               |
 |__bilateral antennal lobe receptor neuron_______________________|
                                                                  adult olfactory receptor neuron Or2a  5 rec.
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Is a antennal olfactory receptor neuron of intermediate sensillum
bilateral antennal lobe receptor neuron
Develops from antennal olfactory receptor neuron precursor Nab
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Synonyms
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DoOR:Or2a
FlyBrain_NDB:10397
VFB:FBbt_00067001