FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Legs are shorter and lack joints. Mutants show no alteration in the amount of cell division in leg imaginal discs. However, cell death is increased, mostly at the interjoint regions.
In the absence of AP-2 activity, activated Nintra.GS.Scer\UAS is not able to rescue joint formation.