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Title: Superoxide dismutase mimetic activity of cytokinin-copper(II) complexes

Abstract

Dissociation constants of cytokinins, derivatives of purine which form complexes which cupric ion, were determined by spectrophotometry and the stability constants of their copper complexes by pH titration. The values found for kinetic were 3.76, 9.96, 7.8, and 15.3 for pK/sub 1/ for pK/sub 2/, logk/sub 1/, and log..beta../sub 2/, respectively, and those for 6-benzylaminopurine were, in the same order, 3.90, 9.84, 8.3, and 15.9. The copper(II) complexes with kinetin and 6-benzylaminopurine had superoxide dismutase mimetic activity, and the reaction rate constants with superoxide, which were determined by polarography. were 2.3 x 10/sup 7/ M/sup -1/s/sup -1/ for kinetin and 1.5 x 10/sup 7/ M/sup -1/s/sup -1/ for 6-benzylaminopurine at pH 9.8 and 25/sup 0/C.

Authors:
;
Publication Date:
Research Org.:
Univ. of Tokyo, Japan
OSTI Identifier:
5071246
Resource Type:
Journal Article
Journal Name:
Biochem. Biophys. Res. Commun.; (United States)
Additional Journal Information:
Journal Volume: 137:1
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; COPPER COMPLEXES; BIOCHEMICAL REACTION KINETICS; PLANT GROWTH REGULATORS; EXPERIMENTAL DATA; PH VALUE; POLAROGRAPHY; PURINES; SPECTROPHOTOMETRY; SUPEROXIDE DISMUTASE; SUPEROXIDE RADICALS; TITRATION; AROMATICS; AZAARENES; COMPLEXES; DATA; ENZYMES; HETEROCYCLIC COMPOUNDS; INFORMATION; KINETICS; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDOREDUCTASES; RADICALS; REACTION KINETICS; TRANSITION ELEMENT COMPLEXES; 560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)

Citation Formats

Inoue, H, and Hirobe, M. Superoxide dismutase mimetic activity of cytokinin-copper(II) complexes. United States: N. p., 1986. Web. doi:10.1016/0006-291X(86)91220-9.
Inoue, H, & Hirobe, M. Superoxide dismutase mimetic activity of cytokinin-copper(II) complexes. United States. https://doi.org/10.1016/0006-291X(86)91220-9
Inoue, H, and Hirobe, M. 1986. "Superoxide dismutase mimetic activity of cytokinin-copper(II) complexes". United States. https://doi.org/10.1016/0006-291X(86)91220-9.
@article{osti_5071246,
title = {Superoxide dismutase mimetic activity of cytokinin-copper(II) complexes},
author = {Inoue, H and Hirobe, M},
abstractNote = {Dissociation constants of cytokinins, derivatives of purine which form complexes which cupric ion, were determined by spectrophotometry and the stability constants of their copper complexes by pH titration. The values found for kinetic were 3.76, 9.96, 7.8, and 15.3 for pK/sub 1/ for pK/sub 2/, logk/sub 1/, and log..beta../sub 2/, respectively, and those for 6-benzylaminopurine were, in the same order, 3.90, 9.84, 8.3, and 15.9. The copper(II) complexes with kinetin and 6-benzylaminopurine had superoxide dismutase mimetic activity, and the reaction rate constants with superoxide, which were determined by polarography. were 2.3 x 10/sup 7/ M/sup -1/s/sup -1/ for kinetin and 1.5 x 10/sup 7/ M/sup -1/s/sup -1/ for 6-benzylaminopurine at pH 9.8 and 25/sup 0/C.},
doi = {10.1016/0006-291X(86)91220-9},
url = {https://www.osti.gov/biblio/5071246}, journal = {Biochem. Biophys. Res. Commun.; (United States)},
number = ,
volume = 137:1,
place = {United States},
year = {Thu May 29 00:00:00 EDT 1986},
month = {Thu May 29 00:00:00 EDT 1986}
}