A truncated su(Hw) protein (encoded by a cDNA fragment), lacking amino acids 881 to 944, is expressed from its own promoter.
su(Hw)7, su(Hw)V, su(Hw)Δ881-944 is a non-suppressor of phenotype of y2
su(Hw)Δ881-944 rescues su(Hw)V
Rescues the sterility of female su(Hw)V homozygotes.