The majority of the endogenous locus (exons coding for 1366 out of 1391 amino acids) is removed and replaced with a visible marker and attP landing site.
NMJ bouton | increased number | larval stage (with fidHA+IC)
fidHA+IC/fidKO is rescued by fidWT.UAS/Scer\GAL4how-24B
fidHA+IC/fidKO is partially rescued by Scer\GAL4how-24B/fidMTD.UAS
fidHA+IC/fidKO is not rescued by fidWT.UAS/Scer\GAL4elav-C155