A PAC contig corresponding to YAC clone y939H03 covering the chromosome breakpoint of Jacobsen syndrome patient RB. STS markers within the contig are listed without the D11 prefix for clarity; e.g., D11S982E is shown as S982E; the prefix dJ is omitted from PAC names. Alternate PACs are shaded. YAC contig position numbers are in parentheses. STSs were demonstrated within PACs by PCR. PAC end clones are given the prefix ec, together with the clone name and end from which they are derived; they were screened against PACs by hybridization. (+) Positive results for PCR of STSs or hybridization with PAC end clones. Overlap of PAC clones in the contig was also determined by cross-hybridization of PACs against each other. (?) An unclear hybridization.
