FB2026_03 , released September 17, 2026
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Term mushroom body output neuron 29 ID (Ontology) FBbt:00049849 (Fly Anatomy)
Definition Atypical mushroom body output neuron whose dendrites arborize in the gamma lobe slices 4 and 5, similar to MBON21 (Li et al., 2020). It also has dendritic arborization outside of the mushroom body, predominantly in the crepine (in both hemispheres) and the superior medial protocerebrum, with some postsynaptic sites in the contralateral gamma lobe (Li et al., 2020). Its presynaptic terminals are mainly found contralaterally, in the crepine and superior medial protocerebrum (Li et al., 2020). There is 1 neuron of this type in each hemisphere (Li et al., 2020). It develops from the larval MBON-a1 (Truman et al., 2023).[ FlyBase:FBrf0248215 FlyBase:FBrf0255928 ]
Also Known As"atypical MBON29" ; "MBON-29" ; "MBON29"
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VFB:FBbt_00049849
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 mushroom body output neuron 29 (all annotations which use CV term, excluding "NOT" statements)
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interneuron
 |__primary interneuron_________________________
primary neuron                                  |
 |__primary interneuron_________________________|
adult mushroom body output neuron               |
 |__adult atypical mushroom body output neuron__|
adult CNS neuron                                |
 |__adult DL2 lineage neuron____________________|
CP3 lineage neuron                              |
 |__adult DL2 lineage neuron____________________|
                                                mushroom body output neuron 29  2 rec.
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Is a adult atypical mushroom body output neuron
adult DL2 lineage neuron
primary interneuron
Develops from larval mushroom body output neuron a1
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VFB:FBbt_00049849