FB2026_02 , released June 18, 2026
Recombinant Construct: P{sβ-140}
Open Close
General Information
Symbol
P{sβ-140}
FlyBase ID
FBtp0005475
Feature type
transgenic_transposable_element
Component Allele(s)
Ecol\lacZSry-β.-140
Size
Expression Data
lacZ reporter
Associated insertion(s)
1 available
Molecular map
Description and Uses
Construct components
Component
Use(s)
Marker(s)
ry+t7.2
Component allele Ecol\lacZSry-β.-140
Transgenic product class
Component
Use(s)
Regulatory region(s)
Sry-beta_-140
Encoded product / tool
lacZ
Description

ClaI genomic fragment containing 142bp of the Sry-β-janA intergenic region is fused to Ecol\lacZHsp70Bb.HZ50. Fragment corresponds to Sry-β sequences from -140bp to +2bp (where +1 refers to the Sry-β transcription start site).

(Yanicostas et al., 1995)
Sequence Data
Sequence (FB)
Associated Sequence Data
DDBJ / EMBL / GenBank
DNA Sequence
Extent
Segments and Size
Total Size
Left end
Right end
 
Segments
Num
Orientation
Symbol
Reference
Phenotypic Data
Expression Data
Reporter Expression
distribution deduced from reporter
Stage
Tissue/Position (including subcellular localization)
Reference
third instar larval stage | male
testis | intense

Comment: NOT observed in other tissues

(Yanicostas et al., 1995)
third instar larval stage & spermatogenesis
testis | restricted
(Yanicostas et al., 1995)
spermatogenesis & adult stage
testis | restricted
(Yanicostas et al., 1995)
Additional Information
Statement
Reference

A EcollacZ construct driven by -140 to +2 of Sry-β (+1 is the Sry-β transcription start site) drives testis-specific expression of EcollacZ. In both the third instar larva and the adult male, expression is not seen in the apical cells of the gonad. In the adult male, faint expression is detected in premiotic spermatocytes, and high levels are detected post-meiotically.

(Yanicostas et al., 1995)
 
Marker for
Reflects expression of
Sry-β
(Yanicostas et al., 1995)
Reporter construct used in assay
Progenitors and Descendants
progenitor(s)
descendant(s)
Comments
Stocks (0)
Stocks containing insertion(s) of this recombinant construct
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (1)
Reported As
Symbol Synonym
P{sβ-140}
(FlyBase, 1996-)
Secondary FlyBase IDs
    References (4)