Construct: hkb minigene made up of the SmaI-EcoRI fragment of the 3' region of the cDNA fused to the BglII-SmaI genomic DNA containing the remaining hkb coding region, expressed from an heat shock promoter.
The most striking phenotypes occur after heat shock at stage 10, just after GMC4-2a is born. Produces duplicate GMC4-2a and RP2 neurons. Duplicated RP2 neurons show normal axonal ipsilateral projections.