FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult hygrosensory neuron Ir40a VP4 ID (Ontology) FBbt:00047225 (Fly Anatomy)
Definition Adult hygrosensory neuron that expresses the humidity-sensing Ionotropic receptor (Ir) 40a, and the co-receptors Ir93a and Ir25a and innervates the antennal lobe glomerulus VP4 bilaterally (Enjin et al, 2016; Knecht et al., 2016; Marin et al., 2020). There are two subtypes that transduce signals from the basiconic sensilla of chamber I or the blunt-tipped sensilla of chamber II (pore-less sensilla) of the sacculus (Enjin et al., 2016; Marin et al., 2020). Its activity is increased by dry air and decreased by humid air (Knecht et al., 2016; Enjin et al., 2016). It develops from an Nba precursor (Benton et al., 2025). There are around 15 of these cells on each side (Benton et al., 2025).[ FlyBase:FBrf0206496 FlyBase:FBrf0215822 FlyBase:FBrf0232388 FlyBase:FBrf0233685 FlyBase:FBrf0246456 FlyBase:FBrf0262710 ]
Also Known As "HRN_VP4" ; "VP4RN"
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VFB:FBbt_00047225
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 adult hygrosensory neuron Ir40a VP4 (all annotations which use CV term, excluding "NOT" statements)       1      3
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hygrosensory neuron
 |__adult hygrosensory neuron Ir40a__________
adult antennal lobe receptor neuron          |
 |__bilateral antennal lobe receptor neuron__|
 |__adult hygrosensory neuron Ir40a__________|
external sense organ sensory neuron          |
 |__adult hygrosensory neuron Ir40a__________|
                                             adult hygrosensory neuron Ir40a VP4  4 rec.
                                              |__adult hygrosensory neuron Ir40a VP4 chamber I
                                              |__adult hygrosensory neuron Ir40a VP4 chamber II
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Is a bilateral antennal lobe receptor neuron
adult hygrosensory neuron Ir40a
Develops from antennal olfactory receptor neuron precursor Nba
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Synonyms
  • "adult olfactory receptor neuron Ir40a VP4" RELATED
    "HRN_VP4" EXACT VFB_SYMBOL
    "VP4RN" EXACT[ FlyBase:FBrf0246456 ]
Secondary IDs
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VFB:FBbt_00047225