Insertion within an intron located between two coding exons, in the appropriate predicted reading frame to fuse the GFP exon in the inserted construct to the endogenous protein.
10% of heterozygous embryos (derived from heterozygous females) show severe defects in germ band retraction and have defects in organ formation, while another 30% have minor defects in myoblast fusion and muscle guidance.
Protein trap line.