FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term lower segment of Malpighian tubule ID (Ontology) FBbt:00047098 (Fly Anatomy)
Definition Segment of the Malpighian tubule between the main segment and the ureter. It lacks Malpighian tubule type II cells (Sozen et al., 1997) and plays a role in reabsorption (Denholm, 2013).[ FlyBase:FBrf0083335 FlyBase:FBrf0093736 FlyBase:FBrf0098338 FlyBase:FBrf0222532 ]
Also Known As "lower tubule"
Comment The term 'lower segment' is sometimes used (e.g. in Xu et al., 2022; FBrf0253737) to refer to the entire stem cell zone, comprising both the lower segment as defined here and the ureter.
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       4
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 Alleles Insertions
 lower segment of Malpighian tubule (all annotations which use CV term, excluding "NOT" statements)       2      4
Spanning Tree (Parents/Children)
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  epithelial tube
   |__Malpighian tubule segment
       |__lower segment of Malpighian tubule  15 rec.
           |__adult lower segment of Malpighian tubule 12 rec.
           |__embryonic lower segment of Malpighian tubule
           |__embryonic/larval lower segment of Malpighian tubule
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Is a Malpighian tubule segment
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