A modified genomic fragment has been inserted into the attP site present in orb2attP via phiC31-mediated recombination. The resulting allele consists of orb2 tagged at the C-terminal end with GFP, in which the orb2 RBD domain has been replaced by the orb RBD domain. A single mFRT11 site is present downstream of the orb2 coding sequence, and single attL and attR sites (generated during the recombination process) are also present.