sina+t11 contains an 11kb genomic DNA fragment (called HX41), consisting of most of the Rh4 intron, the Rh4 exon, and some 3' flanking DNA. Because sina is located in the Rh4 intron, this construct also contains the entire sina transcribed region. The construct also carries a ry gene.
11kb rescue fragment was isolated from a phage lambda library; the location of the downstream endpoint is approximate; position of restriction fragment on reference sequence inferred by FlyBase curator based on author statement.