FB2026_03 , released September 17, 2026
Aberration: Dmel\In(2R)top
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General Information
Symbol
In(2R)top
Species
D. melanogaster
Name
Inversion (2R) torpedo
FlyBase ID
FBab0005141
Feature type
chromosomal_inversion
Computed Cytological Breakpoints (relative to progenitor)

57A;57F1

Sequenced Breakpoints (relative to progenitor)
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Mutagen
gamma ray
Class of aberration (relative to wild type)
chromosomal_inversion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_inversion
Cytological Breakpoints (relative to progenitor)
Causes alleles
Egfrf36
(Price et al., 1989)
Carries alleles
Transposon Insertions
Formalized genetic data

bk2 hits Egfr

Genetic mapping information
Comments

Right break in the large intron separating exon 2 from exon 3 of Egfr; also has a 2.5 kb deletion at the 57F breakpoint.

Comments on Cytology

Inversion breakpoint at 57F is associated with a 2.5kb deletion.

(Price et al., 1989)

Limits of break 1 from polytene analysis (citation unavailable) Limits of break 2 from complementation mapping against Egfr (citation unavailable)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
Partially deleted / disrupted
Molecular Data
Completely deleted
Partially deleted
Genes NOT Deleted / Disrupted
Complementation Data
 
Molecular Data
 
Genes Duplicated
Complementation Data
Completely duplicated
Partially duplicated
Molecular Data
Completely duplicated
Partially duplicated
Genes NOT Duplicated
Complementation Data
 
Molecular Data
 
Affected Genes Inferred by Location (0)
    If no genes are listed here, it may be because the affected region is very large. The JBrowse insert above may show an error for the same reason, and other FlyBase tools such as CytoSearch may also fail for large regions. You can contact FlyBase for more help.
    In these cases, there will be no "Export to Hitlist" button to the left.
    Phenotypic Data
    In combination with other aberrations
    NOT in combination with other aberrations

    homozygous embryonic lethal hemizygous embryonic lethal

    Stocks (0)
    Notes on Origin
    Discoverer
     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     
    Synonyms and Secondary IDs (4)
    Reported As
    Symbol Synonym
    In(2R)Egfr10B
    In(2R)top
    In(2R)top10B
    (Price et al., 1989)
    Name Synonyms
    Inversion (2R) torpedo
    Secondary FlyBase IDs
      References (3)