FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term external sensory organ precursor cell IIa ID (Ontology) FBbt:00005166 (Fly Anatomy)
Definition Second-order precursor cell that develops from an external sensory organ precursor cell I. In the microchaete lineage, it divides to give rise to the tormogen cell and the trichogen cell of an external sensory organ (Gho et al., 1999; Hartenstein and Posakony, 1989). In the development of antennal olfactory sensilla, it produces two daughters, pOa and pOb, which each divide asymmetrically to produce the four types of support cell per sensillum (Endo et al., 2012; Chai et al., 2019).[ FlyBase:FBrf0049554 FlyBase:FBrf0111371 FlyBase:FBrf0217319 FlyBase:FBrf0241429 ]
Also Known As "pIIa" ; "SOPIIa"
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Genes Insertions Constructs
 external sensory organ precursor cell IIa (all annotations which use CV term, excluding "NOT" statements)
     external sensory organ precursor cell IIa | ectopic
      --       --       --
     external sensory organ precursor cell IIa | ectopic | heat sensitive
      --       --
     external sensory organ precursor cell IIa | ectopic | somatic clone
      --       --       --
     external sensory organ precursor cell IIa | heat sensitive
      --       --
     external sensory organ precursor cell IIa | increased number
      --       --
     external sensory organ precursor cell IIa | P-stage
      --
      --
     external sensory organ precursor cell IIa | somatic clone
      --       --       --
     external sensory organ precursor cell IIa | somatic clone | increased number
      --       --       --
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  peripheral sensory precursor cell
   |__external sensory organ precursor cell
       |__external sensory organ precursor cell IIa  79 rec.
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Is a external sensory organ precursor cell
Develops from external sensory organ precursor cell I
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