Most of the l(2)efl coding sequence has been deleted. It has been replaced by sequence encoding a loxP cassette that contains a Disc\RFPDsRed(T1).3xP3.cHa marker.
l(2)eflHR/l(2)eflHR stage 15 embryos show irregular growth of lateral transverse (LT) muscles, dissociation between LT1 and LT2 and/or between LT2 and LT3, irregular LT shape and branched LT extremities, and reduction in the number of LTs.