Figure 1.

Feature map of the 8 Mb region of pig chromosome 17. Each locus is depicted according to type, orientation and position. The tiling path of the sequenced BACs is shown along the top. Below this, the distribution of repeats and C + G content is shown. Box 1 illustrates the zinc-finger locus expansion that has occurred in mouse between EDN3 and PHACTR3. The three regions described in the comparative analyses, PTPN1-CYP24A1, PFDN4-VAPB and STX16-SYCP2, are defined using double-headed arrows.