Hug. Weier et al., PCR CLONING OF A REPEATED DNA FRAGMENT FROM CHINESE-HAMSTER OVARY (CHO) CELL X-CHROMOSOMES AND MAPPING BY FLUORESCENCE IN-SITU HYBRIDIZATION, DNA sequence, 4(1), 1993, pp. 47-51
Hamster chromosome-specific DNA sequences were amplified by primer dir
ected DNA amplification using mixed base oligonucleotides in an arbitr
arily primed polymerase chain reaction (AP-PCR) protocol. The template
DNA was comprised of approximately 3000 chinese hamster ovary cell (C
HO) chromosomes enriched by flow sorting from a human x hamster hybrid
cell line. Labeling of the PCR product pool and fluorescence in site
hybridization (FISH) demonstrated preferential binding to the distal l
ong arm of the CHO X chromosome. The PCR products were cloned, labeled
by PCR and hybridized to metaphase spreads. Clones containing highly
reiterated DNA were identified by FISH and sequenced. Here, we present
the sequence and chromosomal location of one of the repeat clones tha
t maps close to the secondary constriction on the long arm of the CHO
X chromosome, pCAT2066-24.