The following information accompanied stocks donated to the Bloomington Stock Center by Barret Pfeiffer and Gerry Rubin, Janelia Farm Research Campus. P{20XUAS-FLPD5.PEST}, P{20XUAS-FLPG5.PEST} and P{3XUAS-FLPG5.PEST} are similar to the recombinase constructs described in Nern et al (FBrf0214794). FLP recombinase (FBgn0014444) tagged with a PEST sequence is expressed under the control of 20 or 3 UAS copies. FLPD5 denotes FLP recombinase with an aspartic acid at residue 5 and FLPG5 denotes FLP recombinase with a glycine at residue 5 as described in Nern et al. P{20XUAS-FLPD5} is similar to the FLP constructs above, except no PEST sequence is present. P{hs-FLPG5.PEST.Opt} encodes a fly codon-optimized version of FLP recombinase with a glycine at residue 5 and tagged with a PEST sequence, expressed from an Hsp70 promoter. P{20XUAS-FLPD5.PEST}attP2 and P{20XUAS-FLPD5}attP2 are insertions into P{CaryP}attP2 (FBti0040535) at 68A4, 3L:11063638 (R5). P{20XUAS-FLPG5.PEST}attP40, P{hs-FLPD5.fco}attP40 and P{3XUAS-FLPG5.PEST}attP40 are insertions into P{CaryP}attP40 (FBti0114379) at 25C6, 2L:5108448 (R5). P{20XUAS-FLPG5.PEST}attP18 is an insertion into P{CaryP}attP18 (FBti0114370) at 6C12, X:6650355..6654052 (R5). P{3XUAS-FLPG5.PEST}su(Hw)attP8 is an insertion into P{CaryIP}su(Hw)attP8 (FBti0131991) at 8E10, X:9479693..9479763 (R5). P{hs-FLPD5.fco}attP3 is an insertion into P{CaryP}attP3 (FBti0114365) at 19C4, X:20201601 (R5). NOTE: the original text of this Personal Communication pertaining to "P{hs-FLPG5.PEST.Opt}" was edited as a result of the information in FBrf0237684.