Physical mapping studies on the human X chromosome in the region Xq27-Xqter.

Abstract:

:We have characterized three terminal deletions of the long arm of the X chromosome. Southern analysis using Xq27/q28 probes suggests that two of the deletions have breakpoints near the fragile site at Xq27.3. Flow karyotype analysis provides an estimate of 12 X 10(6) bp for the size of the deleted region. We have not detected the deletion breakpoints by pulsed-field gel electrophoresis (PFGE) using the closet DNA probes, proximal to the fragile site. The physical distance between the breakpoints and the probes may therefore be several hundred kilobases. The use of the deletion patients has allowed a preliminary physical map of Xq27/28 to be constructed. Our data suggest that the closest probes to the fragile site on the proximal side are 4D-8 (DXS98), cX55.7 (DXS105), and cX33.2 (DXS152). PFGE studies provide evidence for the physical linkage of 4D-8, cX55.7, and cX33.2. We have also found evidence for the physical linkage of F8C, G6PD, and 767 (DXS115), distal to the fragile site.

journal_name

Genomics

journal_title

Genomics

authors

Patterson M,Schwartz C,Bell M,Sauer S,Hofker M,Trask B,van den Engh G,Davies KE

doi

10.1016/0888-7543(87)90028-0

subject

Has Abstract

pub_date

1987-12-01 00:00:00

pages

297-306

issue

4

eissn

0888-7543

issn

1089-8646

journal_volume

1

pub_type

杂志文章

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