The l(3)j12B4 line is an apparent double insertion line: the 5prime flank (represented by P{lacW}l(3)j12B4-5) is within a copy of Doc at an unknown location, while the 3prime flank (represented by P{lacW}l(3)j12B4j12B4 maps to a unique site consistent with previous localization by in situ hybridization.
The l(3)j12B4 line is an apparent double insertion line: the 5prime flank (represented by P{lacW}l(3)j12B4-5) is within a copy of Doc at an unknown location, while the 3prime flank (represented by P{lacW}l(3)j12B4j12B4 maps to a unique site consistent with previous localization by in situ hybridization.