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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)




Carries alleles
Transposon Insertions
Formalized genetic data

bk1 hits Ddc << l(2)37Fd << bk2 << scw

Genetic mapping information

Ddc DNA coordinates from Gilbert, Hirsh and Wright, 1984, Genetics 106: 679-84: Distal breakpoint within the Ddc gene between +1.4 and 2.4 kb removing the first 5' exon

Comments on Cytology

Ref: Lindsley and Zimm, 1992

Distal breakpoint is within Ddc transcription unit.

Left limit of break 1 from polytene analysis (FBrf0056107) Right limit of break 1 from polytene analysis (FBrf0080145) Left limit of break 2 from polytene analysis (FBrf0035993) Right limit of break 2 from polytene analysis (FBrf0056107)

Sequence Crossreferences
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
    Phenotypic Data
    In combination with other aberrations
    NOT in combination with other aberrations
    Stocks (3)
    Notes on Origin

    Recovered over Ddcts2 in a fly with increased developmental time and with incompletely sclerotinized cuticle.

    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments

    The Df(2L)VA17 chromosome acts as a dominant weak suppressor of telomeric silencing (assayed using the effect of the chromosome on the eye colour phenotype of flies carrying "P{wvar}KR3-2", a stable "brown-red" variant of the P{3'WP-2,wvar}2Lt insertion), but this is a false positive result (the suppressor is not within the bounds of the deficient region) because the region of the deficiency is covered by one or more nonsuppressing deficiencies.

    "37C1--2;37F5--38A11" was stated as revision. 37C1-37C2 breakpoint is between position +2.8 and +3.5 on the Ddc map relative to the HpaI restriction site near the 3' end of Ddc.

    Distal breakpoint of Df(2L)VA17 maps within the Ddc gene.

    "γ ray" was stated as tentative. "ethyl methanesulfonate" was stated as tentative.

    Synonyms and Secondary IDs (1)
    Reported As
    Symbol Synonym
    Name Synonyms
    Secondary FlyBase IDs
      References (27)