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Wyświetlanie 1-3 z 3
Tytuł:
1H-Benzimidazole derivatives as mammalian DNA topoisomerase I inhibitors
Autorzy:
Alpan, A
Gunes, H
Topcu, Zeki
Powiązania:
https://bibliotekanauki.pl/articles/1040939.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
1H-benzimidazole derivatives
type I DNA topoisomerase
plasmid supercoil relaxation assays
Opis:
Benzimidazole is one of the most important heterocyclic groups manifesting various biological properties, such as antibacterial, antifungal, antimicrobial, antiprotozoal and antihelmintic activities. Several benzimidazole derivatives are also active as inhibitors of type I DNA topoisomerases. In this study, three 1H-benzimidazole derivatives with different electronic characteristics at position 5-, namely 5-chloro-4-(1H-benzimidazole-2-yl)phenol (Cpd I), 5-methyl-4-(1H-benzimidazole-2-yl)phenol (Cpd II) and 4-(1H-benzimidazole-2-yl)phenol (Cpd III), were synthesized and evaluated for their effects on mammalian type I DNA topoisomerase activity using quantitative in vitro plasmid supercoil relaxation assays. For the structure elucidation of the compounds, melting points, UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses were interpreted. Among the compounds, 5-methyl-4-(1H-benzimidazole-2-yl)phenol (Cpd II) manifested relatively potent topoisomerase I inhibition.
Źródło:
Acta Biochimica Polonica; 2007, 54, 3; 561-565
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An optimized recipe for cloning of the polymerase chain reaction-amplified DNA inserts into plasmid vectors.
Autorzy:
Topcu, Zeki
Powiązania:
https://bibliotekanauki.pl/articles/1044341.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
bacterial transformation
PCR
cloning
Opis:
This study compares a number of parameters that are important in the ligation of the polymerase chain reaction-amplified DNA inserts into plasmid vectors and their efficient transformation to bacterial cells. The parameters covered were: T4 polynucleotide kinase treatment followed by either the large fragment of E. coli DNA polymerase or T4 DNA polymerase reactions, the amount of T4 DNA ligase, temperature and duration of ligation, molar ratio of insert to vector as well as the total DNA concentration. The results show that the T4 polynucleotide kinase-treated group without further enzymatic manipulation, at an insert to vector ratio of 3:1 gave the highest recombination efficiency when 10 μg/ml DNA and 20 units T4 DNA ligase were applied for ligation for 12 h at 4°C.
Źródło:
Acta Biochimica Polonica; 2000, 47, 3; 841-846
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Densitometric quantification of DNA topoisomers in ethidium bromide-stained agarose gels and chemiluminescence-detected X ray films.
Autorzy:
Topcu, Zeki
Powiązania:
https://bibliotekanauki.pl/articles/1044334.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
densitometry
ethidium bromide
chemiluminescence
DNA topoisomers
Opis:
This study investigates the contribution of deformational strain imposed by topological interconversions of DNA in ethidium bromide-binding on agarose gels. Closed-circular plasmid DNAs were nicked using UV exposure and the DNA bands were quantified by densitometry. The results show that the closed circular DNA binds the same amount of the dye as its nicked counterpart. The relationship between the band intensity on X-ray films of chemiluminescence-detected Southern blots and DNA concentration was shown to be linear.
Źródło:
Acta Biochimica Polonica; 2000, 47, 3; 835-839
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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