FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
Help Close All Open All
General Information
Term border follicle cell ID (Ontology) FBbt:00004905 (Fly Anatomy)
Definition A follicle cell that migrates from the anterior pole of the egg chamber, between the nurse cells, to the anterior of the oocyte where they participate in formation of the micropyle. About 6-10 border cells per egg chamber migrate as a tightly associated cluster.[ FlyBase:FBrf0064777 FlyBase:FBrf0217092 FlyBase:FBrf0247148 ]
Also Known As "border cell"
Comment Can be identified based on expression of slbo (Rust et al., 2020).
Links to External Ontologies
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     524
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      60
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      68
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     300
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes  Insertions Constructs
 border follicle cell (all annotations which use CV term, excluding "NOT" statements)     526     90      1    127    305
     border follicle cell | adult stage       4       --       --       --       3
     border follicle cell | cell autonomous | somatic clone       4       --       --       --       --
     border follicle cell | cell non-autonomous       1       --       --       --       --
     border follicle cell | cell non-autonomous | conditional       3       --       --       --       3
     border follicle cell | cell non-autonomous | ectopic | somatic clone       2       --       --       --       2
     border follicle cell | cell non-autonomous | somatic clone       4       --       --       --       4
     border follicle cell | clone of cells       1       --       --       1       --
     border follicle cell | conditional       2       --       --       --       2
     border follicle cell | decreased number       3       --       --       --       2
     border follicle cell | ectopic       6       --       --       --       4
     border follicle cell | ectopic | somatic clone       9       --       --       --       7
     border follicle cell | germline clone       3       --       --       2       --
     border follicle cell | heat sensitive      19       --       --       5      7
     border follicle cell | increased number       8       --       --       --       7
     border follicle cell | increased number | somatic clone       2       --       --       --       2
     border follicle cell | oogenesis stage S10      10       --       --       3      5
     border follicle cell | oogenesis stage S10 | somatic clone       7       --       --       2       --
     border follicle cell | oogenesis stage S10A | somatic clone       1       --       --       --       --
     border follicle cell | oogenesis stage S9       5       --       --       --       3
     border follicle cell | oogenesis stage S9 | somatic clone       3       --       --       2       --
     border follicle cell | somatic clone     119       --       --      31     20
     border follicle cell | somatic clone | increased number       8       --       --       --       6
     border follicle cell | temperature conditional       2       --       --       1       --
Spanning Tree (Parents/Children)
Only view relationship:
somatic cell of ovariole__
adult epithelial cell_____|
                          follicle cell
                           |__border follicle cell  1049 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a follicle cell
Develops from anterior terminal follicle cell
Part of
hide Synonyms & Secondary IDs
Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
CL:0000579