Deletion of the cell-specific (dAp neuron) cis-regulatory module (CRM) (acts as an enhancer) in kn.
Deletion (1970 bp) of the cell-specific (dAp neuron) cis-regulatory module (CRM) (acts as an enhancer) in kn. Five other small deleted regions (6-14 bp) were identified upstream of this deletion in the same intron in this mutant.