## Abstract The object of this study was to develop a map of G1 phase on the basis of the progressive changes taking place in the morphology of the prematurely condensed chromosomes as the cells traverse through G1 and then use this technique to determine the cell cycle location of normal and trans
Induction of prematurely condensed chromosomes from testicular cells of the mouse
โ Scribed by Helen L. Drwinga; T. C. Hsu; S. Pathak
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 914 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0009-5915
No coin nor oath required. For personal study only.
โฆ Synopsis
Mitotic CHO cells and mouse testicular cells were fused with polyethylene glycol. Several types of prematurely condensed chromosomes were observed. From chromosome morphology it was possible to determine that most of the PCC represented mouse cells. Labeling of either the CHO cells in vitro or the testicular cells in vivo with 3H-TdR prior to fusion also demonstrated that the PCC were derived from the mouse cells. In some PCC, 20 chromosomes could be counted, the haploid number for mouse. It is assumed that these PCC were induced in mouse spermatid nuclei.
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## Abstract The phenomenon of premature chromosome condensation (PCC) is induced in unstimulated horse lymphocytes, bovine spermatozoa, Chinese hamster ovary cells, embryonic chick fibroblasts and erythrocytes, __Xenopus__ kidney and mosquito cells by fusing each of these cell types with HeLa cells
Testicular cells of male mice were isolated, and the incorporation of tritium labeled thymidine into the DNA of the cells was estimated after exposure to various chemical mutagens. The normal semiconservative DNA synthesis was suppressed by the addition of hydroxyurea. Thirteen compounds were tested