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General Information
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| Term |
Malpighian tubule Type II cell |
ID (Ontology) |
FBbt:00005797 (Fly Anatomy) |
| Definition |
Morphologically distinct cell type found only in the initial, transitional and main segments of the Malpighian tubules interspersed with Type I cells. Type II cells are smaller and flatter than Type I cells, with shorter (main segment) or no (initial region) apical microvilli. Type II cells originate from a subset of caudal visceral mesoderm cells that overlie the tubule primordia as they evert from the hindgut. By stage 15, Type II cells have been incorporated in the tubules and adopt epithelial characteristics. In the mature tubules there are on average 110 Type II cells.[ FlyBase:FBrf0064792 FlyBase:FBrf0102373 FlyBase:FBrf0160477 FlyBase:FBrf0222532 ] |
| Also Known As |
"excretory star cell" ; "Malpighian tubule stellate cell" ; "SC" |
| Comment |
These cells are involved in primary urine production via the presence of ion channels that allow chloride and water to enter the tubule lumen (O'Donnell et al., 1998). |
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Links to External Ontologies
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Annotations
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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)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 1 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 4 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | Genes | Insertions | Constructs |
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Malpighian tubule Type II cell (all annotations which use CV term, excluding "NOT" statements) | 4 | 10 | 5 | 1 |
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Relationships