Includes a 55bp sequence between deletion endpoints that does not match either P{lacW}EcRk04504 element or genomic sequences from this region.
Imprecise excision of the P{lacW} element, resulting in a 2.1kb deletion.
Most EcR80/EcRM554fs animals fail to survive to the second larval instar stage and few mutant animals survive to the 3rd larval instar stage. 65-80% of larvae arrested prior to the second instar stage have both 1st and 2nd instar mouth hooks, while those arrested prior to the third instar stage have both 2nd and 3rd instar mouth hooks.