FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

outer membrane

ID (Ontology)

GO:0019867 (Gene Ontology)

Definition

The external membrane of Gram-negative bacteria or certain organelles such as mitochondria and chloroplasts; freely permeable to most ions and metabolites.

Comment

Links to External Ontologies

QuickGO data AmiGO data

Annotations

Records annotated with this term OR any of its CHILD TERMS

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

Data Class	Field	Direct annotations
Genes (FBgn)	GO_CELLULAR_COMPONENT

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	Genes
outer membrane (all annotations which use CV term, excluding "NOT" statements)
located_in \| outer membrane

Spanning Tree (Parents/Children)

  cellular anatomical structure
   |__membrane
       |__outer membrane  108 rec.
           |__cell outer membrane
           |   |__curli secretion complex
           |   |__external side of cell outer membrane(+)
           |   |__extrinsic component of cell outer membrane(+)
           |   |__mycolate outer membrane(+)
           |   |__periplasmic side of cell outer membrane(+)
           |   |__starch utilization system complex
           |__organelle outer membrane 108 rec.
           |   |__chloroplast thylakoid membrane(+)
           |   |__mitochondrial outer membrane(+) 103 rec.
           |   |__nuclear outer membrane(+) 5 rec.
           |   |__plastid outer membrane(+)
           |__outer endospore membrane

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	membrane
Part of
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts