An approximately 6kb fragment containing the wild type RpS12 locus (excluding introns 2 and 3 that encode snoRNA:Me28S-A774a and snoRNA:Me28S-A774b), the 5' end of the AdenoK gene and the whole of the Zmynd10 gene. An insertion sequence within the first intron of the AdenoK gene (near position 3L:13 ,022 kb) is included.
Two copies of RpS12Δ2-3.6kb rescue the lethal phenotype of RpS12s2783/RpS12EP3025 transheterozygotes.