Zeitschrift fur Naturforschung. Section C. Biosciences. Tubingen
- Print ISSN
- Electronic ISSN
- Usage rank
- Article count
- Free count
- Free percentage
- PDFs via platforms
- Proquest and CSA
Biochemical characterization of propylglyoxal bis(guanylhydrazone). Facile synthesis of monoalkylglyoxal bis(guanylhydrazones).
Propylglyoxal bis(guanylhydrazone) sulfate, a novel analog of the well-known antileukemic drug methylglyoxal bis(guanylhydrazone), has been prepared from 2,2-dibromopentanal, and the compound has been characterized biochemically. Although it is a powerful inhibitor of S-adenosylmethionine decarboxyl...
Formation and decay of the vanadate complex of the sarcoplasmic reticulum calcium transport protein.
The calcium free sarcoplasmic reticulum calcium transport ATPase incorporates in the presence of magnesium ions approx. 8 nmol monovanadate per mg protein, indicating the formation of a complex containing one vanadate residue per enzyme molecule. On ligand-removal or dilution, the saturated enzyme c...
Effects of norfloxacin and rifampicin on growth and streptolysin S production in hemolytic streptococci.
Norfloxacin, a nalidixic acid analogue, inhibited streptolysin S (SLS) production when added to young streptococcal culture. DNA synthesis was mainly affected, but increment of cell mass, RNA and protein was also significantly reduced in streptococci treated with norfloxacin. In stationary phase cel...
Composition and distribution of lipids in tissues of bogue (Boops boops).
Total lipids from liver, head, skin and muscle of Bogue were separately isolated and their composition was investigated by a combination of analytical determinations, and column and thin layer chromatography. The major components of the neutral lipid fractions from all tissues studied were triglycer...
Nucleotide sequence of bovine 1.723 satellite DNA.
The nucleotide sequence of the bovine 1.723 satellite DNA repeated unit was determined. The 680 bp long period of this satellite DNA does not show any significant sequence similarities with the known bovine satellite DNAs. Short repetitive sequences which are parts of 680 bp long repeated units do n...
Kinetics of calcium-induced fusion of cell-size liposomes with monolayers in solutions of different osmolarity.
The effects of osmolarity, calcium concentration and cell-size liposomes in the subphase on the surface tension of phospholipid monolayers were investigated. The monolayers were spread from chloroform solutions of phosphatidic acid at air/water solution interface. The liposomes (of average diameter...
Dependence on membrane lipids of the effect of vanadate on calcium and ATP binding to sarcoplasmic reticulum ATPase.
The affinity of the sarcoplasmic reticulum transport ATPase for calcium and ATP is not affected by lipid deprivation while vanadate binding is completely abolished. Lipid substitution restores vanadate binding as well as the vanadate induced disappearance of the enzyme's high affinity calcium and nu...
Conductivity of normal and pathological human erythrocytes (homozygous beta-thalassemia) at radiowave frequencies.
The conductivity of normal and homozygous beta-thalassemic erythrocyte suspensions has been measured over the frequency range from 5 KHz to 100 MHz in the temperature interval from 5 to 45 degrees C. The electrical parameters of the membrane, i.e., the capacitance CM and the conductance GM per unit...
Biosynthesis of the bufadienolide ring of scillirosid in Scilla maritima.
Administration of sodium [1,2-14C2]oxaloacetate and sodium [1-14C]acetate to Scilla maritima plants yielded labelled scillirosid. A systematic degradation of scillirosid indicated that the alpha-pyrone ring of the bufadienolide is formed by the condensation of a pregnane derivative (derived from mev...
3'-Hydroxylation of 4'-methoxyisoflavones by Fusarium oxysporum f. lycopersici.
3'-Hydroxylation of isoflavones by Fusarium oxysporum f. lycopersici mainly proceeds with 4'-methoxy-7-hydroxyderivatives; this reaction is used for quantitative conversion of 14C-labelled isoflavones.