FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Aberration: Dmel\Df(2L)J4
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General Information
Symbol
Df(2L)J4
Species
D. melanogaster
Name
Deficiency (2L) Jammed
FlyBase ID
FBab0001479
Feature type
chromosomal_deletion
Computed Breakpoints include

31A-31B;31F-32A

Features within 31A--32A
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
J1
(Mange and Sandler, 1973)
Mutagen
X ray
(Mange and Sandler, 1973)
Class of aberration (relative to wild type)
chromosomal_deletion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_deletion
(Mange and Sandler, 1973)
Breakpoints

31B;31F

(Mange and Sandler, 1973)

31A-31B;31F-32A

(Schmidt et al., 1996)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

bk1 << M(2)31A << da << bk2

Genetic mapping information
Comments
Comments on Cytology

All limits from polytene analysis (FBrf0088926)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
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

    Df(2L)TW119/Df(2L)J4 third instar larvae show significantly more crystal cells in the lymph gland and in the sessile compartment compared to heterozygous controls.

    (Gueguen et al., 2013)
    NOT in combination with other aberrations

    Flies heterozygous for the deletion show a Minute bristle phenotype.

    (Marygold et al., 2007)

    Lethal over da

    Stocks (0)
    Notes on Origin
    Discoverer
     

    Revertant

    (Mange and Sandler, 1973)
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     
    Synonyms and Secondary IDs (8)
    Reported As
    Symbol Synonym
    Df(2L)J-der-4
    (Mange and Sandler, 1973)
    Df(2L)J-der4
    Df(2L)J-rv4
    Df(2L)J4
    (O'Hara et al., 2024, Louradour et al., 2017, Zhou et al., 2015, Gueguen et al., 2013, Minidorff et al., 2007, Wu et al., 2007, Matova and Anderson, 2006, Mace et al., 2005, Lehmann et al., 2002)
    Df(J4)
    (Kenmoku et al., 2017)
    DfJ4
    (Zhou et al., 2015)
    J4
    (Hegde et al., 2022)
    Name Synonyms
    Deficiency (2L) Jammed
    Secondary FlyBase IDs
      References (22)