[Peculiarities of the reassociation kinetics of fast repeating sequences of thermolabile fractions of hepatoma Zaidel DNA]. 1979

A B Fonarev, and A V Shugaliĭ, and A L Tikhonravov, and K P Khanson, and I N Todorov

The six fractions of rat liver DNA (DNAL) and hepatoma Zaidel DNA (DNAHZ) were obtained by thermal fractionation of these DNAs on a HAP column at equivalent temperature intervals. The percent of two thermolabile fractions obtained at 62--78 degrees is approximately 10% higher for DNAHZ than for DNAL. The reassociation kinetics were carried out till Cot = 5.10(-1). Computer analysis of the kinetics showed considerable difference between the parameters (percent of the sequence and rate constant) only for these thermolabile fractions DNAL and DNAHZ. The two-fold reduction of the reassociation rate for the second thermolabile fraction DNAHZ (63--78 degrees) can be associated with the presence of short uncomplementary pieces in the fast repeating sequences. On the other hand the increase of the rate constant for the initial part of the kinetics reassociation of the first thermolabile fraction (62--73 degrees) of DNAHZ is due to the nicks which are revealed by alkali sucrose centrifugation of the DNAHZ fractions.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008114 Liver Neoplasms, Experimental Experimentally induced tumors of the LIVER. Hepatoma, Experimental,Hepatoma, Morris,Hepatoma, Novikoff,Experimental Hepatoma,Experimental Hepatomas,Experimental Liver Neoplasms,Hepatomas, Experimental,Neoplasms, Experimental Liver,Experimental Liver Neoplasm,Liver Neoplasm, Experimental,Morris Hepatoma,Novikoff Hepatoma
D009695 Nucleic Acid Renaturation The reformation of all, or part of, the native conformation of a nucleic acid molecule after the molecule has undergone denaturation. Acid Renaturation, Nucleic,Acid Renaturations, Nucleic,Nucleic Acid Renaturations,Renaturation, Nucleic Acid,Renaturations, Nucleic Acid
D004247 DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004273 DNA, Neoplasm DNA present in neoplastic tissue. Neoplasm DNA
D004355 Drug Stability The chemical and physical integrity of a pharmaceutical product. Drug Shelf Life,Drugs Shelf Lives,Shelf Life, Drugs,Drug Stabilities,Drugs Shelf Life,Drugs Shelf Live,Life, Drugs Shelf,Shelf Life, Drug,Shelf Live, Drugs,Shelf Lives, Drugs
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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