FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term adult midgut region R4 ID (Ontology) FBbt:00110901 (Fly Anatomy)
Definition Region of the adult midgut that forms a complex loop and that re-orients the gut towards the posterior part of the abdomen and ends ventrally. It can be subdivided into an anterior part containing an extremely folded epithelium (R4a) and two posterior regions composed of cells with short apical protrusions resulting in an enlarged lumen (R4b and R4c).[ FlyBase:FBrf0221749 FlyBase:FBrf0222542 ]
Comment Adult midgut regions R4 and R5 correspond to the previously described posterior midgut (Buchon et al., 2013).
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       5
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       2
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Relevant FlyBase reports
 Alleles Insertions Constructs
 adult midgut region R4 (all annotations which use CV term, excluding "NOT" statements)       5      1      3
     adult midgut region R4 | nutrition conditional       2       --       2
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  gut section
   |__adult midgut region
       |__adult midgut region R4  9 rec.
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Is a adult midgut region
Part of adult posterior midgut
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