fasciculates with develops from expresses sends synaptic output throughout has sensory dendrite in Ir75b adult antennal lobe commissure antennal olfactory receptor neuron precursor Nab antennal olfactory receptor neuron of coeloconic sensillum adult antennal lobe receptor neuron antennal coeloconic sensillum ac3 type I bilateral antennal lobe receptor neuron antennal lobe glomerulus DL2d adult olfactory receptor neuron Ir75b 2011-11-03T01:56:34Z ORN ac3 fly_anatomy.ontology FlyBrain_NDB:10385 ionotropic receptor neuron Ir75b/a ionotropic receptor neuron Ir75a/b Ir75a/b ac3 ORN Ir75b/a ORN Ir75a/b ORN_DL2d This neuron was directly shown to be olfactory by electrophysiological recordings of a single neuron (Benton et al., 2009). Prieto-Godino et al. (2017) showed that these cells do not express Ir15a and previous detection of Ir75a (Benton et al., 2009) was likely due to transcription of the 5' end of Ir75a at the 3' end of Ir75b transcripts, rather than genuine Ir75a coding transcripts. They also show that cells expressing the Ir75b and Ir75c proteins are distinct (with previous co-occurrence similarly due to transcriptional run off from Ir75c). VFB:FBbt_00110016 ORN_DL2d Ir75b ac3I DoOR:Ir75b ORN (DL2d) FBbt:00110016 Ir75ab/a ac3 Adult olfactory receptor neuron that expresses the Ionotropic receptor (Ir) 75b and the co-receptor Ir8a (Silbering et al., 2011; Prieto-Godino et al., 2017; Benton et al., 2025). It innervates antennal glomerulus DL2d bilaterally (Prieto-Godino et al., 2017; Benton et al., 2025). Its dendrite transduces signals from antennal coeloconic sensillum ac3 type I (Prieto-Godino et al., 2017). It responds to carboxylic acids and aldehydes (Prieto-Godino et al., 2017; Benton et al., 2025). It develops from an Nab precursor (Benton et al., 2025). There are around 8 of these cells on each side (Schlegel et al., 2021; Benton et al., 2025). ORN ac3A adult olfactory receptor neuron Ir75a/b ORN Ac3IA