Construct: Premature stop codon after amino acid 630 (numbers as described in FBrf0048107).
Two copies of P{sev-DlTM} cause very irregular ommatidial arrays with multiple bristles and occasionally the 'blueberry' phenotype, which is associated with loss of cone cells.
DeltaTM.sev has phenotype, enhanceable by Df(1)N-54l9
DeltaTM.sev has phenotype, suppressible by H1
Protein behaves as a dominant-negative.