Map position of low copy repeats and summary of diagnostic mapping information. An ideogram of 22q is shown; below is a line representing 22q11 with the genetic landmarks described by Buetow et al. (1994) indicated (not to scale) and covering a distance of 34.2 cM. The seven repeat-containing contigs are indicated by a solid line separated by dashes. The repetitive landmark content or GGT interval of the seven repeat-containing contigs is shown above the line representing each contig. Below each landmark further mapping information is shown where appropriate, with the analysis performed indicated on the left. The PvuII and HindIII fragments are as labeled in Table 2. (L) GGTI (liver)-amplified fragment; (K) GGTII (kidney)-amplified fragment; (N) neither GGTI- or GGTII-amplified; and (U) unknown. (FP1–FP4) Bacterial clone contigs constructed by fingerprinting as described in the text. The GGT genes 1–3, 6, 11–13 are numbered according to Courtay et al. (1994) and the GGT genes I and II are numbered according to Pawlak et al. (1989). Gene 13 has not been placed in this interval experimentally, but displays a single base missing as compared with gene 11 (Table 3), hence the ? symbol.
