Open AccessMICROCALORIMETRIC STUDIES ON THE FORMATION OF MAGNESIUM COMPLEXES OF ADENINE NUCLEOTIDES
Author(s) -
Jean-Pierre Bélaı̈ch,
J.C. Sari
Publication year - 1969
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.64.2.763
Subject(s) - nucleotide , magnesium , chemistry , isothermal microcalorimetry , ionic strength , ionic bonding , adenine nucleotide , phosphate , chemical stability , inorganic chemistry , ion , stereochemistry , enthalpy , thermodynamics , biochemistry , organic chemistry , aqueous solution , physics , gene
Values for the thermodynamic quantities (ΔF , ΔH , ΔS ) in reactions in which complexes of adenine nucleotides with magnesium ion (ATPMg-- , ADPMg- , AMPMg) are formed have been obtained by a microcalorimetric technique by using an isothermic Calvet's apparatus.Experimental values measured at ionic strength μ = 0.2 indicate that complex formation reactions are driven by the entropic factor and that stability of complexes increases with length of the phosphate chain.