An internally deleted su(Hw) protein (encoded by a cDNA fragment), lacking amino acids 738 to 780, is expressed from its own promoter.
su(Hw)7, su(Hw)V, su(Hw)Δ738-780 is a suppressor of phenotype of y2
su(Hw)Δ738-780 fails to rescue su(Hw)V
Fails to rescue the sterility of female su(Hw)V homozygotes.