part of capable of expresses sends synaptic output throughout has sensory dendrite in Ir64a sensillum of ventral sacculus chamber III adult antennal lobe receptor neuron carbon dioxide sensitive neuron antennal lobe glomerulus DC4 adult olfactory receptor neuron Ir64a adult olfactory receptor neuron Ir64a DC4 2015-09-16T12:25:37Z ORN_DC4 FBbt:00111210 DoOR:Ir64a.DC4 FlyBrain_NDB:10384 ionotropic receptor neuron DC4 VFB:FBbt_00111210 Adult olfactory receptor neuron Ir64a that innervates the antennal lobe DC4 glomerulus, bilaterally (Ai et al., 2010; Silbering et al., 2011). Its dendrite transduces signals from a grooved sensillum of the ventral compartment of chamber III of sacculus (Shanbhag et al., 1995). It responds to acid (H+ ions) and carbon dioxide (Ai et al., 2010). There are around 10 of these cells on each side (Benton et al., 2025). fly_anatomy.ontology ORN_DC4 detection of pH by chemoreceptor signaling sensory perception