Allosteric effects in norbadione A. A clue for the accumulation process of 137Cs in mushrooms?
A fruitful combination of potentiometry, absorption spectrophotometry, ESMS and 1H NMR enabled the characterisation of two caesium complexes with norbadione A and the determination of the respective stability constants of a mononuclear and a dinuclear caesium complex at pH approximately 6; a preliminary study allowed the assignment of five protonation sites of this pigment; a positively cooperative binding of the second Cs+ cation was observed.
Laboratoire de Physico-Chimie Bioinorganique, UMR 7509 du CNRS, Faculté de Chimie, Université Louis Pasteur (ULP), 67000 Strasbourg, France.
Sandrine
S
Garaudée
Mourad
M
Elhabiri
Daniel
D
Kalny
Céline
C
Robiolle
Jean-Michel
JM
Trendel
Raymond
R
Hueber
Alain
A
Van Dorsselaer
Pierre
P
Albrecht
Anne-Marie
AM
Albrecht-Gary
D015107:4-Butyrolactone / Q000031:analogs & derivatives / Q000737:chemistry* / Q000493:pharmacokinetics; D000363:Agaricales / Q000378:metabolism*; D002588:Cesium Radioisotopes / Q000493:pharmacokinetics; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010648:Phenylacetates / Q000737:chemistry* / Q000493:pharmacokinetics; D011199:Potentiometry
D002588:Cesium Radioisotopes; D010648:Phenylacetates; C464564:norbadione A; D015107:4-Butyrolactone