Fig. 4. Sxl increases Ci levels. Western blot of adult male (M) and female (F) flies stained for Ci and ß-tubulin (ß-tub). Left pair shows relative loading difference of protein between the sexes (females less) when the Ci signal is approximately the same; right pair has the ß-tubulin levels approximately the same between the sexes, females have more Ci. Lanes taken from the same blot; for each protein, the time of exposure for male versus female lane is the same.