Mutant homozygotes lack all imaginal discs and die 'during pupation'. Mutant heterozygote acts as a dominant enhancer of the R7 phenotype of sina4. Antibody localises protein to apical surface of photoreceptor cells in the eye disc, as well as to contractile rings of dividing cells in embryo and imaginal discs. pupal lethal.
pnut1 is an enhancer of photoreceptor cell R7 phenotype of sina4
pnut1/+ significantly suppresses the reduced eye phenotype caused by expression of grimGMR.PC, WGMR.PG or rprGMR.PW.
Increases the severity of the mutant R7 phenotype of sina4 : double mutants have four times fewer R7 cells.