FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term A band ID (Ontology) GO:0031672 (Gene Ontology)
Definition The dark-staining region of a sarcomere, in which myosin thick filaments are present; the center is traversed by the paler H zone, which in turn contains the M line.[ ISBN:0321204131 ]
Also Known As "A disc" ; "anisotropic disc" ; "Q disc" (for all, see Synonyms field below)
Comment
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  QuickGO data     AmiGO data
Annotations
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
Genes (FBgn)  GO_CELLULAR_COMPONENT       4
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       3
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Constructs
 A band (all annotations which use CV term, excluding "NOT" statements)       5      6      3
     A band | adult stage | progressive       4       --       3
     A band | larval stage       2       --       1
     located_in | A band       --       4       --
Spanning Tree (Parents/Children)
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cellular_component
 |__cellular anatomical structure__
myofibril                          |
 |__sarcomere______________________|
cellular anatomical structure      |
 |__sarcomere______________________|
                                   A band  95 rec.
                                    |__C zone
                                    |__H zone 16 rec.
                                    |__M band 75 rec.
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Is a cellular anatomical structure
Part of sarcomere
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Synonyms
  • "A disc" EXACT
    "anisotropic disc" EXACT
    "Q disc" EXACT
    "transverse disc" EXACT
Secondary IDs
hide External Crossreferences & Linkouts
Wikipedia:Sarcomere#bands