A genomic BAC (#CH322-25015) comprising 19,384 bp genomic DNA (from 4,631,615 to 4,650,999 on chromosome 3), roughly centered on aqz and encompassing the whole aqzlocus, but also including four other neighboring genes (IscU, CG8369, CG9837, and hng2) and lncRNA:CR43130, that partially overlaps the aqz sequence in the opposite orientation.