Schematic diagram of the structure of pMM2D3. The insert of the plasmid is displayed with its SP6-end on the left. Alignments of sequence contigs are shown by the lower horizontal bars labeled as RS, RT, R1, R2, R3 and R4. Sequences of R1, R2, R3 and R4 consisted of the Y chromosome-specific repeat sequences. Approximate sizes of contigs are given in parentheses in kb. The order of contigs in brackets was not determined. Putative genes are indicated by closed boxes above (left-to-right orientation) and below (right-to-left orientation) the line. Recognition sites for PacI (P) and SfiI (S) determined by restriction digestion and electrophoresis are indicated by vertical lines. Clusters of the Y chromosome- specific repeat sequences are indicated by open boxes. The exact position of M2D3.5 within the clone is not known because of the repeat sequences, but its orientation is predicted from the orientation of the repeat sequences at the proximal ends of RS and RT.