Fragment from exon 1 to exon 6 has been replaced by the corresponding cDNA fragment.
wild-type
su(f)+tWG8 rescues su(f)unspecified
su(f)+tWG8 rescues su(f)27
Line 4 fully rescues su(f) mutant phenotypes (lethality and suppression of the f1 phenotype), lines 2 and 3 do not.
Shows an insertion-position sensitivity for rescue of the su(f) mutant phenotype.