FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

H zone

ID (Ontology)

GO:0031673 (Gene Ontology)

Definition

A relatively pale zone traversing the center of the A band of a sarcomere, visible in relaxed muscle fibers; consists of the central portion of thick (myosin) filaments that are not overlapped by thin (actin) filaments.[ ISBN:0321204131 ]

Also Known As

"H band" ; "H disc"

Comment

Links to External Ontologies

QuickGO data AmiGO data

Annotations

Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

Results list data from multiple species. Choose a record type above to open its HitList.

Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
Genes (FBgn)	GO_CELLULAR_COMPONENT
Constructs (FBtp)	PHENOTYPE_MANIFEST_IN

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles	Genes	Constructs
H zone (all annotations which use CV term, excluding "NOT" statements)
H zone \| adult stage		--
located_in \| H zone	--		--

Spanning Tree (Parents/Children)

cellular_component
 |__cellular anatomical structure__
sarcomere                          |
 |__A band_________________________|
cellular anatomical structure      |
 |__A band_________________________|
                                   H zone  16 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	cellular anatomical structure
Part of	A band
Synonyms & Secondary IDs
Synonyms
	"H band" EXACT "H disc" EXACT
Secondary IDs

External Crossreferences & Linkouts
	Wikipedia:Sarcomere#bands