A 40-Mb YAC contig covering the distal long arm of chromosome 11. Attop are the 169 resolved positions defined by the associated STSs. The prefix S in the name of STSs is an abbreviation of D11S. Alternate YACs are shaded for clarity. + and ? indicate a positive or uncertain PCR result for the STS at that position, respectively. Hatched segments indicate possible physical deletions or regions of instability in the YACs, consistently observed in different preparations of the same YAC. A discontinuity in the contig between positions 143 and 144 is indicated by a gap. Numbers of positions linked by a single YAC are boxed. Positions 106 and 107 (asterisks) had the reverse order in the PAC contig of Fig. 2.
