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General Information
D. melanogaster
FlyBase ID
Feature type
Inserted Element
Affected gene(s)
Viability / fertility


Genomic Location
Chromosomal Location
2L ( 37A6 )
Sequence Location
2L:18,821,507..18,821,508 [+]
Target / Docking site
Member of Large Scale Dataset(s)

A set of stocks that each contain a Trojan-GAL4 gene trap sequence in a coding intron, inserted via the CRISPR/Cas-9 drop-in technique described in Kanca et al., 2019, eLife 8: e51539 (FBrf0244062). The inserted cassette acts contains a 'Trojan GAL4' gene trap element composed of a splice acceptor site followed by the T2A peptide, the GAL4 coding sequence and an SV40 polyadenylation signal. When inserted in a coding intron in the correct orientation, the cassette should result in truncation of the trapped gene product and expression of GAL4 under the control of the regulatory sequences of the trapped gene. Each line contains one of three versions of the cassette (TI{CRIMIC.TG4.0}, TI{CRIMIC.TG4.1} or TI{CRIMIC.TG4.2}), depending on the frame required to generate a gene trap. In addition, the presence of inverted attP sites flanking the inserted DNA allows for the entire cassette to be replaced with DNA from a compatible donor plasmid (where the sequence to be inserted is flanked by inverted attB sites) through recombination-mediated cassette exchange (RMCE) driven by the phiC31:int integrase.

Detailed Mapping Data
Chromosome (arm)
Sequence Location
2L:18,821,507..18,821,508 [+]
Cytological location (computed by FlyBase)
37A6 (inferred by FlyBase from sequence location)
Cytological location (reported)
37A6_r6 (reported as inferred from sequence location)
Insertion into Natural transposon
Comments concerning location
Sequence Data
Flanking sequence
Inserted Element
Location-dependent role
Size (Kb)
Component Allele(s)
Molecular map
Affected Gene(s)
Insertion may affect gene
Alleles and Phenotypes
Expression Data
Reporter Expression
Additional Information
Marker for
Reflects expression of
Reporter construct used in assay
Data on Genetic Line
Origin as a multiple insertion line
Progenitor(s) within the Genome
Related Aberration or Balancer
Stocks (1)
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (1)