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General Information
D. melanogaster
FlyBase ID
Feature type
Computed Breakpoints include
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Class of aberration (relative to wild type)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

l(1)2Ae << bk1 << bk2

Genetic mapping information

DNA breakpoint (2B1-2) between coordinates 31.3 and 35.3 (Chao and Guild, 1986, EMBO J. 5: 143-50).

Comments on Cytology

Left limit of break 1 from polytene analysis (FBrf0037773) Right limit of break 1 from polytene analysis (FBrf0048191) Limits of break 2 from polytene analysis (citation unavailable)

Sequence Crossreferences
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
Genes NOT Duplicated
Affected Genes Inferred by Location
    Phenotypic Data
    In combination with other aberrations
    NOT in combination with other aberrations

    brrbp-4/Df(1)St490 heterozygotes are female sterile, Dp(1;f)101 can restore fertility.

    Suppressor effect on In(1)wm4h position-effect variegation phenotype.

    l(1)1Fd (Voelker) or su(f). With duplication, both sexes viable and wild type except for presence of occipital bristles.

    Stocks (3)
    Notes on Origin

    Dobzhansky, 1930.


    deletion of most of X euchromatin

    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments
    Synonyms and Secondary IDs (2)
    Reported As
    Symbol Synonym
    Name Synonyms
    Secondary FlyBase IDs
      References (20)