A constitutively secreted form of fj (comprises amino acids 102-583 of fj tagged at the N-terminal end with the Tag:SS(rCd2) signal sequence) is expressed under the control of genomic fj regulatory sequences; 8.7 kb upstream sequence and 4.3 kb downstream sequence is present.
fjt14.Tag:SS(rCd2) partially rescues fjd1
fjt14.T:Rnor\CD2 only weakly rescues the wing shortening seen in fjd1 homozygotes (rescue is less than with fj+t14, as measured by inter-crossvein distance).