fasciculates with develops from expresses sends synaptic output throughout has sensory dendrite in Ir75c adult antennal lobe commissure antennal olfactory receptor neuron precursor Nab antennal olfactory receptor neuron of coeloconic sensillum adult antennal lobe receptor neuron adult olfactory receptor neuron Ir75c 2021-09-23T12:22:22Z ORN ac3 ORN (DL2v) fly_anatomy.ontology ORN ac3A Ir75c ac3II ORN_DL2v FBbt:00051495 Prieto-Godino et al. (2017) showed that these cells are distinct from the Ir75b cells and that previous belief of co-expression was due to transcriptional run off from Ir75c. VFB:FBbt_00051495 Olfactory receptor neuron that expresses the Ionotropic receptor (Ir) 75c and the co-receptor Ir8a (Prieto-Godino et al., 2017; Benton et al., 2025). Its dendrite transduces signals from antennal coeloconic sensillum ac3 type II and its axonal terminals are found in glomerulus DL2v (Prieto-Godino et al., 2017), bilaterally (Schlegel et al., 2021). It has a stronger response to propionic acid and a weaker response to butyric acid, compared to Ir75b neurons (Prieto-Godino et al., 2017). It develops from an Nab precursor (Benton et al., 2025). There are approximately 12 of these cells per antenna (Schlegel et al., 2021). ORN ac3IIA FlyBrain_NDB:10386 DoOR:Ir75c ORN_DL2v antennal coeloconic sensillum ac3 type II bilateral antennal lobe receptor neuron antennal lobe glomerulus DL2v