P{UAS-Dl.H2N} is identical to P{UAS-Dl.EI} except that the XbaI restriction site, which replaced nucleotides encoding Met619 and Lys620 in P{UAS-Dl.EI}, has been reverted to wild type by replacing it with the corresponding region from the original Dl c1 cDNA clone.
Amino acid replacement: H2N.