Kinetic scheme for Ca2+-arsenazo III interactions.

@article{Dorogi1983KineticSF,
  title={Kinetic scheme for Ca2+-arsenazo III interactions.},
  author={P. Dorogi and C. Rabl and E. Neumann},
  journal={Biochemical and biophysical research communications},
  year={1983},
  volume={111 3},
  pages={
          1027-33
        }
}
Temperature-jump relaxation kinetic studies show that the complex formation between Ca2+ and the metallochromic dye arsenazo III (Ar) is associated with a rapid mode (less than or equal to 10 mus-range) involving both Ca2+ and Na+ of the Na-salt of Ar and a slower mode (approximately 10 ms range) which can be attributed to structural rearrangements in the 1:2 complex CaAr2. The kinetic data suggest the scheme: Ca+2Ar = CaAr+Ar = CaAr2 = CaAr2. The relatively slow rate-limiting step sets a limit… Expand
Kinetics and mechanism of Ca2+ binding to arsenazo III and antipyrylazo III.
  • P. Dorogi
  • Chemistry, Medicine
  • Biochimica et biophysica acta
  • 1984
TLDR
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Abstract Stopped-flow studies of the calcium-arsenazo III (Ar) system exhibit reaction time constants ranging from 4 to 20 ms, mainly caused by the formation of CaAr and CaAr2 complexes ( [ Ca ] 0 =Expand
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