A truncated form of run, lacking the putative secretory signal sequence, is expressed under the control of UASt regulatory sequences.
larval EL neuron, with Scer\GAL4en-e16E
larval EL neuron, with Scer\GAL4sca-537.4
Embryos expressing runΔSS.Scer\UAS under the control of Scer\GAL4sca-537.4 or Scer\GAL4en-e16E produce extra EL neurons, containing an average of 16.4 or 13.5 eve-expressing cells per hemisegment respectively.