When two copies of Ablftz.PH are introduced into Abl4 mutants, axonal crossovers are reduced from 53% in Abl4 single mutants to 39% in the presence of the transgene.
When two copies of Ablftz.PH are introduced into Abl2 mutants, axonal crossovers are reduced from 68% in Abl2 single mutants to 37% in the presence of the transgene.
Co-expression of two copies of each AblKN.ftz and Ablftz.PH in Abl4 homozygous mutants results in axonal midline crossovers in 54% of embryos, a value almost identical to that observed in Abl4 mutants alone.