منابع مشابه
Asynchrony of Dna Synthesis in Chromosomes of Human Diploid Cells
It has been previously demonstrated (1) that the length of the period of DNA synthesis (S period) as measured by uptake of tritiated thymidine is approximately the same in several animal cells. Since the length of this period (with a range of 6/~ to 8 hours) appears to be independent of the species of the cell, the chromosome number, the cells of human diploid strains in long term cultivation.
متن کاملDNA synthesis by partially purified replicating simian virus 40 chromosomes.
We have partially purified replicating simian virus 40 (SV40) chromosomes in a form which allows continued DNA synthesis in vitro. We first prepare a soluble DNA-synthesizing system from SV40-infected monkey cells and then sediment the components through a neutral sucrose gradient of extremely low ionic strength. Replicating SV40 chromosomes isolated from such gradients are capable of continuin...
متن کاملRelationship between RNA Synthesis and Loop Structure in Lampbrush Chromosomes.
t Predoctoral fellow trainee in Molecular Genetics (USPH 2G-319). 1 Yankofsky, S. A., and S. Spiegelman, these PROCEEDINGS, 48, 1069 (1962). 2 Yankofsky, S. A., and S. Spiegelman, these PROCEEDINGS, 48, 1466 (1962). 3Spahr, P. F., and A. Tissi~res, J. Mol. Biol., 1, 237 (1959). 4Yankofsky, S. A., and S. Spiegelman, unpublished observations (1962). 5 Kurland, C. G., J. Mol. Biol., 2, 83 (1960). ...
متن کاملA bouquet of chromosomes.
During meiotic prophase, telomeres attach to the inner nuclear envelope and cluster to form the so-called meiotic bouquet. Although this has been observed in almost all organisms studied, its precise function remains elusive. The coincidence of telomere clustering and initiation of chromosome synapsis has led to the hypothesis that the bouquet facilitates homologous chromosome pairing and synap...
متن کاملThe Differential Capacity for Rna Synthesis among Chromosomes: a Cytological Approach.
It is an established concept that in any given cell or tissue of a multicellular organism, only a part of the total genetic information is used. Although the exact mechanism has not been elucidated, it is presumed that reversible and irreversible inactivations of genetic loci with respect to RNA synthesis are the controlling factors. Hoyer and McCarthy' have demonstrated with DNA/RNA hybridizat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Medical Genetics
سال: 1994
ISSN: 1468-6244
DOI: 10.1136/jmg.31.11.900-b