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Journals and Conferences
Synthesis of 9-(β-d-arabinofuranosyl)guanine (ara-G) from 1-(β-d-arabinofuranosyl)cytosine (ara-C) and guanine, guanosine or 2′-deoxyguanosine (dG) by glutaraldehyde-treated Escherichia coli BM-11 cells is described. It is shown that the concentration of phosphate ions, molar ratio of substrates and pH of the reaction medium are factors affecting product… (More)
The title compound was prepared by a two step enzymatic procedure consisting of DNA hydrolysis to the mixture of 2′-deoxynucleosides followed by a transdeoxyribosilation of exogenous adenine.
The title compounds were prepared by an enzymatic transdeoxyribosylation from 2′ dGuo or 2′ dThd to the respective heterocyclic bases, 5-ethyluracil and (E)-5-(2-bromovinyl)uracil, using the whole bacterial cells ofEscherichia coli as a biocatalyst.
Time-resolved fluorescence of 1,8-anilinonaphthalene sulfonate (1,8-ANS) fluorescent probe bound to intact human oxyhemoglobin (HbO2) is investigated. Fluorescence emission spectra of 1,8-ANS in a potassium buffer solution (pH 7.4) of HbO2 undergo a substantial blue shift during first 6 ns after pulsed optical excitation at 337.1 nm. Nonexponential… (More)
The interaction of rat liver microsomal cytochrome P-450 with phospholipids has been investigated employing differential scanning microcalorimetry. It is shown that the thermotropic behaviour of phospholipid vesicles reconstituted with cytochrome P-450 depends on liposome composition, protein concentration and the mode of reconstituted system preparation.… (More)
Substrate activity of 1- and 3-deazapurines in the reaction of microbiological ribo- 2-deoxyribosylation catalysed by purine nucleoside phosphorylase of viable cells ofE. coli BMT-1D/1A has been studied. Guanosine or 2′-deoxyguanosine were used as donors. 1-Deazapurines are good substrates in both reactions; 3-deazapurines are very effective… (More)
Human glycosylated haemoglobin A1C is a stable minor variant formed in vivo by post-translational modification of the main form of haemoglobin by glucose. Crystals of oxyHbA1C were obtained using the hanging-drop vapour-diffusion method and PEG as precipitant. The diffraction pattern of the crystal extends to a resolution of 2.3 A at 120 K. The crystals… (More)
Binding of 1,8-anilinonaphthalene sulfonate (1,8-ANS) to main (HbA(1)) and glycosylated (HbA(1C)) forms of human oxyhemoglobin in the presence/absence of inositolhexaphosphate (IHP) in 50 mM potassium phosphate buffer, pH 7.4, was studied by time-correlated single photon counter with subnanosecond time resolution. The redistribution of contributions of the… (More)
2′-Deoxythymidine was synthesized by an enzymatic transdeoxyribosylation of thymine using either (i) dGuo, dCyd or dAdo, or (ii) the mixture of the same 2′-deoxynucleosides resulting from enzymatic hydrolysis of DNA as donors of 2-deoxyribofuranose moiety.