2008/06/20 by E. Gelagutashvili, Eteri Gelagutashvili, Gelagutashvili, Eteri
Biochemistry, Genetics and Molecular Biology · Chemistry · Medicine · Physics and Astronomy · #Biological Physics (physics.bio-ph) #Chemical Physics (physics.chem-ph) #DNA and Nucleic Acid Chemistry #FOS: Physical sciences #Metal complexes synthesis and properties #Nanomaterials for catalytic reactions #physics.bio-ph #physics.chem-ph
paper · pdf · doi:10.48550/arxiv.0806.3368
13 pages, 0 figures
arxiv created 2008/06/20 · openalex publication_date 2008/06/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The stoichiometric binding constants of Nickel(II), Cobalt(II), Manganese(II), Silver(I), Zinc(II) ions with DNA, from Spirulina platensis were determined from their binding isotherms by equilibrium dialysis and atomic absorption spectroscopy. It was shown, that the nature of these ions interaction with DNA, from S .platensis is different. For Cobalt(II), Zinc(II) ions were observed cooperative effects and existence of two different types of the binding sites. Nickel(II)_, Silver(I) -DNA complexes shows independent and identical binding sites and Manganese(II)_ negative cooperative interaction. The logarithm of binding constants for Cobalt (II)_, Nickel (II)_, Manganese (II)_, Zinc (II)_, Silver (I) - DNA, from S. platensis in 3 mM Na(I) are 5.11; 5.18; 4.77; 5.05; 5.42; respectively. The linear correlation of logarithm of binding constants (for complexes of metal-DNA from S. platensis) and the covalent index of Pauling are observed.