6.4kb XbaI-BamHI genomic fragment extending from position -2.1 to +4.3, contains all the structural and flanking sequences necessary for wild type expression of su(f).
Position of restriction fragment on reference sequence inferred by FlyBase curator.
su(f)+t6.4 rescues su(f)1
Rescues su(f) null mutants, independent of site of insertion of P{su(f)BX64}.
Rescues lethal alleles for viability and rescues viable alleles for the suppression of the f1 phenotype.