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  • Title: Interaction of sulphate and chloride with cobalt(II)-carbonic anhydrase.
    Author: Moratal JM, Donaire A, Salgado J, Martinez-Ferrer MJ.
    Journal: J Inorg Biochem; 1990 Nov; 40(3):245-53. PubMed ID: 2127282.
    Abstract:
    The interaction between Cobalt(II)-Bovine Carbonic Anhydrase II and the inhibitors sulphate and chloride have been investigated through 1H NMR and electronic absorption spectroscopies. Both inhibitors bind to the metal ion forming a 1:1 adduct and the corresponding affinity constants have been determined. These inhibitors interact weakly with CoBCA II and this interaction only occurs at low pH values. The T1 values of the meta-like protons of the coordinated histidines have been measured. The coordination number of the metal ion in the adducts is discussed on the basis of temperature dependence of the isotropic shifts, T1, and molar absorbance values.
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