Two bacterial artificial chromosome (BAC) libraries, spanning almost the entire D. melanogaster genome in insert sizes of 20 and 80 kb, that allow easy integration into the fruit fly genome at defined docking sites provide a rich resource to study gene expression and function. We constructed Drosophila melanogaster bacterial artificial chromosome libraries with 21-kilobase and 83-kilobase inserts in the P[acman] system. We mapped clones representing 12-fold coverage and encompassing more than 95% of annotated genes onto the reference genome. These clones can be integrated into predetermined attP sites in the genome using ΦC31 integrase to rescue mutations. They can be modified through recombineering, for example, to incorporate protein tags and assess expression patterns.

Versatile P[acman] BAC libraries for transgenesis studies in Drosophila melanogaster