A truncated su(Hw) protein (encoded by a cDNA fragment), lacking amino acids 673 to 943, is expressed from its own promoter.
su(Hw)Δ673-943, su(Hw)7, su(Hw)V is a suppressor of phenotype of y2
su(Hw)Δ673-943 fails to rescue su(Hw)V
Fails to rescue the sterility of female su(Hw)V homozygotes.