ninaE promoter sequences drive expression of amino acid residues 1-328 of trp fused with amino acid residues 336-681 of trpl and amino acid residues 675-1275 of trpl. This construct is tagged at the C-terminal with EGFP.
The presence of trp::trplninaE.trp1-328.trpl336-681.trp675-1275.T:Avic\GFP-EGFP in trpl302; trp9 double mutants results in a response to light that declines towards baseline during prolonged intense light.