The FlyBase sequence location entry for P{lacW}Ubr3G0307a (FBti0012904) is a range X:7 ,937,484..7,937,689 + (release 6). This is based on the limits of the flanking sequence (GenBank AJ426755). The GenBank annotation places the insertion at base 200 of the 207 sequence, placing the insertion at X:7 ,937,682..7,937,682 +.