FlyBase Allele Report: Dmel\bt[l-b]

FB2026_01 , released March 12, 2026

FB2026_01 , released March 12, 2026

Allele: Dmel\bt^l-b

General Information

Symbol

Dmel\bt^l-b

Species

D. melanogaster

Name

FlyBase ID

FBal0027984

Feature type

allele

Associated gene

Associated Insertion(s)

Carried in Construct

Also Known As

23

Key Links

Allele class

Mutagen

X ray

Nature of the Allele

Allele class

Mutagen

(Hochman, 1971, Hochman et al., 1964)

Progenitor genotype

Cytology

Description

Mutations Mapped to the Genome

Curation Data

Type

Location

Additional Notes

References

Variant Molecular Consequences

Associated Sequence Data

DDBJ / EMBL / GenBank

DNA sequence

Protein sequence

UniProtKB/Swiss-Prot

UniProtKB/TrEMBL

Expression Data

Reporter Expression

Additional Information

Statement

Reference

Marker for

Reflects expression of

Reporter construct used in assay

Human Disease Associations

Disease Ontology (DO) Annotations

Models Based on Experimental Evidence ( 0 )

Disease

Evidence

References

Modifiers Based on Experimental Evidence ( 0 )

Disease

Interaction

References

Comments on Models/Modifiers Based on Experimental Evidence ( 0 )

Disease-implicated variant(s)

Phenotypic Data

Phenotypic Class

female fertile (with bt^C)

(Weasner et al., 2025)

(Hochman, 1971)

lethal (with bt^{11th-exon-dsRed})

(Zhang et al., 2014)

lethal (with bt^A)

(Weasner et al., 2025)

lethal (with Df(4)C3)

(Weasner et al., 2025)

lethal (with Df(4)ED6382)

(Weasner et al., 2025)

lethal | recessive

(Hochman et al., 1964)

lethal - all die before end of larval stage | recessive

(Ayme-Southgate et al., 1995)

lethal - all die during embryonic stage | recessive

(Hochman, 1976, Hochman, 1974)

some die during embryonic stage | recessive

(Hochman, 1976, Hochman, 1974)

some die during larval stage | recessive

(Ayme-Southgate et al., 1995)

Phenotype Manifest In

Detailed Description

Statement

Reference

External Data

Interactions

Show genetic interaction network for Enhancers & Suppressors

Phenotypic Class

Phenotype Manifest In

Additional Comments

Genetic Interactions

Statement

Reference

Xenogenetic Interactions

Statement

Reference

Complementation and Rescue Data

Complements

(Ayme-Southgate et al., 1995)

Partially complements

Fails to complement

(Ayme-Southgate et al., 1995)

(Ayme-Southgate et al., 1995)

(Ayme-Southgate et al., 1995)

Comments

Images (0)

Mutant

Wild-type

Stocks (1)

4231

w¹¹¹⁸; bt^l-b/In(4)ci^D, ci^D pan^ciD

Notes on Origin

Discoverer

External Crossreferences and Linkouts ( 0 )

Synonyms and Secondary IDs (5)

Reported As

Symbol Synonym

23

(Hochman, 1976, Hochman, 1974, Hochman et al., 1964)

2^b

(Hochman, 1971)

bt^I-b

(Zhang et al., 2014)

bt^l-b

l(4)2^b

Name Synonyms

Secondary FlyBase IDs

References (7)

Report Sections