Expression of a 3500bp DNA fragment containing the entire trpl coding region is driven by an Hsp70 promoter.
wild-type
trplhs.PN rescues trpl302
Reintroduction of trplhs.PN to trpl302; trp2 mutants rescues the mutant defect and restores visual physiology. Photoreceptor cells produce quantum bumps (the unitary event of a single photon) that are indistinguishable from wild type.