FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term axon initial segment ID (Ontology) GO:0043194 (Gene Ontology)
Definition Portion of the axon proximal to the neuronal cell body, at the level of the axon hillock. The action potentials that propagate along the axon are generated at the level of this initial segment.[ PubMed:1754851 PubMed:21551097 ]
Also Known As "initial segment"
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 Alleles Constructs
 axon initial segment | adult stage (all annotations which use CV term, excluding "NOT" statements)       3      1
     axon initial segment | larval stage       1       --
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  cellular_component
   |__cellular anatomical structure
       |__axon initial segment
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Is a cellular anatomical structure
Part of main axon
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Synonyms
  • "initial segment" EXACT
Secondary IDs
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NIF_Subcellular:sao256000789