Diagram of the sequenced cosmids cosL7L (A) and cos16J20 (B). cosL7L contains the ci , plexin–homolog, and the ribosomal protein genes, whereas cos16J20 contains the 5′ end of the zfh-2 gene. The λ clone λci+N1 and the cDNA clone D2 are also shown relative to the cosL7L clone. Shown on each cosmid are the positions for the Hoppel and DINE repeats and the HB repeat described in the text. The DINE repeats are numbered and are shown above the line (F) for one orientation or below the line (R) for the other. The location of the clustered repeat is shown upstream from the ci transcript. Physical mapping shows that ci is transcribed in a distal to proximal direction along the chromosome, whereas the orientation of cos16J20 on the chromosome is such that zfh-2 is transcribed in a proximal to distal direction (data not shown).
