The adenine nucleotides, adenosine diphosphate, adenosine triphosphate, (ATP), and the methylene-bridge analogues are inhibitors of rickettsial adsorption to and the hemolysis of sheep erythrocytes. Other nucleotides, adenosine monophosphate, cyclic adenosine monophosphate, cytosine triphosphate, and guanosine triphosphate, are without effect. Adsorption and hemolysis require the generation of ...

The amount of thymidine-H(3) converted to thymidine-H(3) monophosphate in 30 min formed the basis for assays of thymidine kinase in cell extracts from Tetrahymena pyriformis. The optimal concentration of adenosine triphosphate is lower than that required by other cell types. Thymidine triphosphate does not exercise any feedback control of the enzyme. Other deoxyprimidine nucleotides were tested...

The membrane adenosine triphosphatase (E.C. 3.6.1.3) from Escherichia coli has been solubilized with Triton X-100 and purified to near homogeneity. The purified enzyme has a sedimentation coefficient of 12.9S in a sucrose gradient, corresponding to a molecular weight of about 360,000. On electrophoresis in gels containing sodium dodecyl sulfate, it dissociates into subunits with apparent molecu...

Aims Coronary heart disease is one of the leading causes mortality in modern societies. The associated with lack physical activity and expression some genes involved blood cholesterol transportation. Adenosine triphosphate (ATP)-binding cassette transporters G5/G8) ABCG5 ABCG8) adenosine triphosphate-dependent box protein 5 8, a member ABC transporter family, playing crucial role high-density l...

Continuous application of organic fertilizers can cause accumulation phosphorus (P) in soil, especially the low-molecular-weight (LMWOP) forms. This P pool represents a potentially important source for both plants and microorganisms. To understand effect long-term fertilization (30 years) (P-rich soil) vs. fallowing (P-poor on bioavailability fate LMWOP subtropical paddy soils, we determined so...