Apparent homozygous lethal or sterile deletion as unbalanced heterozygote. [NOTE: a user has reported that gk5787 homozygotes are viable but extremely slow growing, taking about 5 to 7 days to reach adulthood.] Deletion of 3433 bp with Calarco/Colaiacovo selection cassette conferring myo-2 GFP and G418 resistance inserted at break. Pick viable fertile GFP+ animals to maintain. Left flanking sequence: TGCCTATCAGTCTATAGTTTTCATTATCCA. Right flanking sequence: AATGTTTTTGTCACGAAAGTTAAATAAGAT. Please reference Au et al., G3 9(1): 135-144 2019 in any work resulting from use of this mutation.