FB2026_02 , released June 18, 2026
Aberration: Dmel\Df(2L)b84a4
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General Information
Symbol
Df(2L)b84a4
Species
D. melanogaster
Name
Deficiency (2L) black
FlyBase ID
FBab0001732
Feature type
chromosomal_deletion
Computed Breakpoints include

34D3;35B2

Features within 34D3--35B2
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Mutagen
gamma ray
Class of aberration (relative to wild type)
chromosomal_deletion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_deletion
(McNabb et al., 1996, Roote et al., 1996, Phillips et al., 1993, Gubb et al., 1990)
Breakpoints

34D3;35B1-35B2

(McNabb et al., 1996, Roote et al., 1996, Phillips et al., 1993, Gubb et al., 1990)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

kuz << bk1 << l(2)34Db << noc << bk2 << osp

Genetic mapping information
Comments

Breakpoint(s) molecularly mapped

(Chia et al., 1985)
Comments on Cytology

Left limit of break 1 from polytene analysis (FBrf0051930) Right limit of break 1 from inclusion of b (FBrf0064653) Left limit of break 2 from inclusion of noc (FBrf0087599) Right limit of break 2 from polytene analysis (FBrf0051930)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Genes NOT Deleted / Disrupted
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

    Weakly suppresses the zeste phenotype in a z1 w11E4; Tp(1;2)TE35B homologue.

    (Gubb et al., 1990)
    NOT in combination with other aberrations

    Chromosome acts as a weak trans-suppressor of a physical interaction between tandemly duplicated copies of w+, an interaction that is required for the suppression of genes by z1.

    (Gubb et al., 1990)
    Stocks (0)
    Notes on Origin
    Discoverer

    G. Harrington.

     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     

    Reported to not delete Adhr in error; see FBrf0141768 for correction.

    (Roote et al., 1996)
    Synonyms and Secondary IDs (3)
    Reported As
    Symbol Synonym
    Df(2)b84a4
    (Phillips et al., 1993)
    Df(2L)b84a4
    Name Synonyms
    Deficiency (2L) black
    Secondary FlyBase IDs
      References (10)