One of six regions of sequence similarity with Hsap\FAT4 been deleted from ft in ft^Tag:V5.

Expression of ft^ΔF.T:SV5\V5 rescues the lethality associated with ft⁸/ft^G-rv. However the wings of the rescued flies are 4% larger than normal and shorter and wider than normal wings. The distance between the anterior and posterior crossveins is also reduced. Wing hair planar cell polarity phenotypes are still present, with the most proximal part of the wing, the costa, the most severely affected. A subtle phenotype is observed in the abdomen. The intercellular ridges continue to run from anterior to posterior as in the ft⁸/ft^G-rv mutant posterior wings, rather than proximally to distal, as is seen in wild type.

Expression of one copy of ft^ΔF.T:SV5\V5 partially suppresses the wing overgrowth phenotype seen in ft⁸/ft^G-rv mutant flies expressing one copy of ft^ΔD.T:SV5\V5.

Expression of one copy of ft^ΔD.T:SV5\V5 partially suppresses the wing crossvein spacing and hair polarity phenotypes seen in ft⁸/ft^G-rv mutant flies expressing one copy of ft^ΔF.T:SV5\V5.