The induction/loss of the oxidant-resistant phenotype of Chinese hamster ovary (CHO) cell variants does not correlate with sensitivity to DNA single strand breakage by hydrogen peroxide

1994 ◽  
Vol 48 (9) ◽  
pp. 1701-1706 ◽  
Author(s):  
Piero Sestili ◽  
Flaminio Cattabeni ◽  
Orazio Cantoni
Keyword(s):  
Hydrogen Peroxide ◽  
Chinese Hamster Ovary ◽  
Chinese Hamster ◽  
Single Strand ◽  
Cho Cell ◽  
Resistant Phenotype ◽  
Strand Breakage

scholarly journals Cloning and characterization of small circular DNA from Chinese hamster ovary cells.

1984 ◽  
Vol 4 (1) ◽  
pp. 173-180 ◽  
Author(s):  
S W Stanfield ◽  
D R Helinski
Keyword(s):  
Chinese Hamster Ovary ◽  
Cho Cells ◽  
Chinese Hamster Ovary Cells ◽  
Chinese Hamster ◽  
Single Copy ◽  
Chromosomal Dna ◽  
Cho Cell ◽  
Ovary Cells ◽  
Chromosomal Sequences

Small polydisperse circular (spc) DNA was isolated and cloned, using BglII from Chinese hamster ovary (CHO) cells. The properties of 47 clones containing at least 43 different BglII fragments are reported. The majority of the clones probably contain entire sequences from individual spcDNA molecules. Most of the clones were homologous to sequences in CHO cell chromosomal DNA, and many were also homologous to mouse LMTK- cell chromosomal sequences. The majority of homologous CHO cell chromosomal sequences were repetitive, although a few may be single copy. Only a small fraction of cloned spcDNA molecules were present in every cell; most occurred less frequently than once in 15 cells. Localization studies indicated that at least a portion of spcDNA is associated with the nucleus in CHO cells.

scholarly journals Isolation of Chinese hamster ovary cells that overproduce asparaginyl-tRNA synthetase.

1984 ◽  
Vol 4 (9) ◽  
pp. 1939-1941
Author(s):  
R E Cirullo ◽  
J J Wasmuth
Keyword(s):  
Chinese Hamster Ovary ◽  
Chinese Hamster Ovary Cells ◽  
Chinese Hamster ◽  
Trna Synthetase ◽  
Temperature Sensitive ◽  
Ovary Cells ◽  
Resistant Phenotype ◽  
Lines Of Evidence

Temperature-resistant revertants, derived from the temperature-sensitive CHO asparaginyl-tRNA synthetase mutant, Asn-5, were isolated and characterized. Several lines of evidence indicate that the temperature-resistant phenotype of the revertants is due to their overproducing the same altered enzyme present in the Asn-5 parent.

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