FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
CV Term Report
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General Information
Term adult midgut region R3 ID (Ontology) FBbt:00110897 (Fly Anatomy)
Definition Region of the adult midgut that contains the copper cells. This region initiates a retrograde folding of the midgut, (from posterior to anterior), and it follows a ventral-dorsal axis. It can be subdivided into an anterior section containing the copper cells (R3ab) and a posterior one with large flat cells (R3c).[ FlyBase:FBrf0216495 FlyBase:FBrf0221749 ]
Also Known As "adult acid zone" ; "adult middle midgut"
Comment This adult midgut region corresponds to the previously described region called middle midgut (Buchon et al., 2013).
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Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      29
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      25
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Relevant FlyBase reports
 Alleles Insertions Constructs
 adult midgut region R3 (all annotations which use CV term, excluding "NOT" statements)      30      2     26
Spanning Tree (Parents/Children)
Only view relationship: 
adult midgut
 |__adult midgut region__
midgut                   |
 |__middle midgut________|
gut section              |
 |__middle midgut________|
 |__adult midgut region__|
                         adult midgut region R3  89 rec.
                          |__adult middle midgut class I enteroendocrine cell
                          |__adult middle midgut class II enteroendocrine cell
                          |__adult midgut region R3ab 32 rec.
                          |   |__adult copper cell 22 rec.
                          |   |__adult midgut interstitial cell 8 rec.
                          |   |__adult midgut region R3a 4 rec.
                          |   |__adult midgut region R3b 4 rec.
                          |__adult midgut region R3c 7 rec.
                          |   |__adult midgut large flat cell 7 rec.
                          |__enterocyte of middle adult midgut epithelium 35 rec.
                              |__adult copper cell 22 rec.
                              |__adult midgut interstitial cell 8 rec.
                              |__adult midgut large flat cell 7 rec.
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adult midgut region
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