R. Nagaraja et al., X-CHROMOSOME MAP AT 75-KB STS RESOLUTION, REVEALING EXTREMES OF RECOMBINATION AND GC CONTENT, PCR methods and applications, 7(3), 1997, pp. 210-222
A YAC/STS map of the X chromosome has reached an inter-STS resolution
of 75 kb. The map density is sufficient to provide YACs or other large
-insert clones that are cross-validated as sequencing substrates acros
s the chromosome. Marker density also permits estimates of regional ge
ne content and a detailed comparison of genetic and physical map dista
nces. Five regions are detected with relatively high G + C correlated
with gene richness; and a 17-Mb region with very low recombination is
revealed between the Xq13.3 (XIST) and Xq21.3 XY homology loci.