FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term sour-sensing neuron of the leg ID (Ontology) FBbt:00051970 (Fly Anatomy)
Definition Sensory neuron that responds to sour (acidic) stimuli and innervates a taste bristle in the leg. These are characterized by expression of ionotropic receptors Ir76b and Ir25a, which are required for their response to acids, and the absence of sweet (Gr64f) and bitter (Gr33a) gustatory receptors (Chen and Amrein, 2017).[ FlyBase:FBrf0236716 ]
Comment Sweet (Gr64f) and bitter (Gr33a) neurons of the leg do not respond to sour stimuli (Chen and Amrein, 2017).
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VFB:FBbt_00051970
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thoracic neuron
 |__leg taste bristle chemosensory neuron__
gustatory receptor neuron                  |
 |__sour-sensing neuron____________________|
bristle sensory neuron                     |
 |__leg taste bristle chemosensory neuron__|
adult gustatory receptor neuron            |
 |__leg taste bristle chemosensory neuron__|
adult PNS neuron                           |
 |__leg taste bristle chemosensory neuron__|
                                           sour-sensing neuron of the leg
                                            |__sour-sensing neuron of mesothoracic leg tarsal taste bristle 5b
                                            |__sour-sensing neuron of mesothoracic leg tarsal taste bristle 5v
                                            |__sour-sensing neuron of metathoracic leg tarsal taste bristle 5b
                                            |__sour-sensing neuron of metathoracic leg tarsal taste bristle 5v
                                            |__sour-sensing neuron of prothoracic leg tarsal taste bristle 5b
                                            |__sour-sensing neuron of prothoracic leg tarsal taste bristle 5s
                                            |__sour-sensing neuron of prothoracic leg tarsal taste bristle 5v
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Is a leg taste bristle chemosensory neuron
sour-sensing neuron
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VFB:FBbt_00051970