Comparative mapping of the region of RPSA in sheep and cattle. The ovine BAC mini-contig is drawn in part A. Triangles represent BAC end sequences; pointing towards the 3'-end of the BAC clone. Black triangles represent BES from which primers were designed to construct the mini-contig. White triangles are BES from which it was impossible to design STS-primers. Black squares show overlaps between BES and other BAC clones. Black circles represent genes annotated by PCR. Annotated sequences are shown in a plane map in part B. The position and orientation of the genes present in the syntenic region of Bos taurus are represented with arrows (C).