FB2026_02 , released June 18, 2026

CV Term Report

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General Information

Term

external side of plasma membrane

ID (Ontology)

GO:0009897 (Gene Ontology)

Definition

The leaflet of the plasma membrane that faces the extracellular side of the cell, including any protein embedded in, attached to, or peripherally associated with it.

Also Known As

"external leaflet of plasma membrane" ; "outer surface of cytoplasmic membrane"

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
Genes (FBgn)	GO_BIOLOGICAL_PROCESS
Genes (FBgn)	GO_CELLULAR_COMPONENT
Genes (FBgn)	GO_MOLECULAR_FUNCTION

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	Gene Groups	Genes
external side of plasma membrane (all annotations which use CV term, excluding "NOT" statements)
is_active_in \| external side of plasma membrane	--
located_in \| external side of plasma membrane	--

Spanning Tree (Parents/Children)

membrane
 |__plasma membrane____________
 |__side of membrane___________|
cell periphery                 |
 |__plasma membrane____________|
cellular anatomical structure  |
 |__cell surface_______________|
 |__side of membrane___________|
                               external side of plasma membrane  39 rec.
                                |__external side of apical plasma membrane 1 rec.
                                |__extrinsic component of external side of plasma membrane
                                |   |__extrinsic component of periplasmic side of plasma membrane
                                |__periplasmic side of plasma membrane
                                    |__extrinsic component of periplasmic side of plasma membrane

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	side of membrane
Part of	plasma membrane cell surface
Synonyms & Secondary IDs
Synonyms
	"external leaflet of plasma membrane" EXACT "juxtamembrane" BROAD "outer surface of cytoplasmic membrane" EXACT
Secondary IDs

External Crossreferences & Linkouts