A truncated su(Hw) protein (encoded by a cDNA fragment), lacking amino acids 782 to 944, is expressed from its own promoter.
su(Hw)7, su(Hw)V, su(Hw)Δ782-944 is a suppressor of phenotype of y2
su(Hw)Δ782-944 fails to rescue su(Hw)V
Fails to rescue the sterility of female su(Hw)V homozygotes.