FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
Help Close All Open All
General Information
Term adult olfactory receptor neuron Or56a ID (Ontology) FBbt:00067063 (Fly Anatomy)
Definition Adult olfactory receptor neuron (ORN) that expresses Or56a and Or33a (Stensmyr et al., 2012). Its dendrite transduces signals from antennal basiconic sensillum ab4 and it detects geosmin (via the Or56a receptor), which indicates the presence of harmful microbes (Stensmyr et al., 2012). Its axon innervates the DA2 glomerulus in the ipsilateral antennal lobe, then crosses the midline via the antennal commissure to innervate the contralateral antennal lobe glomerulus DA2 (Stocker et al., 1990; Stensmyr et al., 2012). It expresses sNPF (Carlsson et al., 2010). It develops from an Nab precursor (Benton et al., 2025). There are approximately 20 of these cells on each side (Benton et al., 2025).[ FlyBase:FBrf0051437 FlyBase:FBrf0179238 FlyBase:FBrf0187305 FlyBase:FBrf0190010 FlyBase:FBrf0211156 FlyBase:FBrf0220150 FlyBase:FBrf0233453 FlyBase:FBrf0262710 ]
Also Known As "adult olfactory receptor neuron Or56a/33a" ; "adult ORN Or33a" ; "adult ORN Or56a" (for all, see Synonyms field below)
Comment
Links to External Ontologies
VFB:FBbt_00067063
Annotations
Records annotated with this term OR any of its CHILD TERMS
    Results list data from multiple species. Click on a button above and use the 'Filter by species' options on the resulting HitList to retrieve species-specific data.
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       1
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Constructs
 adult olfactory receptor neuron Or56a (all annotations which use CV term, excluding "NOT" statements)       3      1      3
     adult olfactory receptor neuron Or56a | somatic clone       1       --       --
Spanning Tree (Parents/Children)
Only view relationship: 
peptidergic neuron
 |__sNPF neuron________________________________________________
 |__adult peptidergic neuron___________________________________|
neurosecretory neuron                                          |
 |__sNPF neuron________________________________________________|
 |__adult neurosecretory neuron________________________________|
eo neuron                                                      |
 |__antennal olfactory receptor neuron of basiconic sensillum__|
adult antennal olfactory receptor neuron                       |
 |__antennal olfactory receptor neuron of basiconic sensillum__|
adult neuron                                                   |
 |__adult neurosecretory neuron________________________________|
 |__adult peptidergic neuron___________________________________|
adult antennal lobe receptor neuron                            |
 |__bilateral antennal lobe receptor neuron____________________|
                                                               adult olfactory receptor neuron Or56a  7 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a sNPF neuron
antennal olfactory receptor neuron of basiconic sensillum
bilateral antennal lobe receptor neuron
adult neurosecretory neuron
adult peptidergic neuron
Develops from antennal olfactory receptor neuron precursor Nab
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "adult olfactory receptor neuron DA2" RELATED
    "adult olfactory receptor neuron Or33a" RELATED
    "adult olfactory receptor neuron Or56a" RELATED
    "adult olfactory receptor neuron Or56a/33a" EXACT
    "adult ORN Or33a" EXACT
    "adult ORN Or56a" EXACT
    "adult ORN Or56a/33a" EXACT
    "ORN (Or56a)" EXACT
    "ORN ab4B" EXACT[ FlyBase:FBrf0250923 ]
    "ORN_DA2" EXACT VFB_SYMBOL
Secondary IDs
hide External Crossreferences & Linkouts
DoOR:ab4B
DoOR:Or33a
DoOR:Or56a
FlyBrain_NDB:10409
VFB:FBbt_00067063