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• W2063635354 abstract "The interaction of hydroxypyridinones with human serum transferrin and ovotransferrin has been studied by analyzing the distribution of iron between the chelator and the proteins as a function of both ligand concentration and transferrin saturation. The kinetics of iron removal by 3-hydroxypyridin-4-ones from both transferrins is slow; in ovotransferrin it appears to be monophasic, in contrast to that observed for serum transferrin. After 24 hours incubation at a 40:1 chelator:protein molar ratio, the percentage of iron removed from Fe(III)-ovotransferrin is 50%-60%, and is somewhat higher in the case of serum transferrin, in line with the respective affinity constants for the metal. The 3-hydroxypyridin-2-ones and the 3-hydroxypyran-4-ones, both of which have lower affinities for Fe(III), remove smaller proportions of the metal. The percentage of desaturation obtained with bidentate and hexadentate pyridinones appears to be similar for both transferrin classes at chelator:protein molar ratios from 40:1. The degree of transferrin saturation influences the extent of chelator mediated iron mobilization in the case of serum transferrin, but not of ovotransferrin. 59Fe competition studies demonstrate that bidentate pyridin-4-ones are capable of donating iron to serum apotransferrin; the relative concentrations of ligand and protein influence the distribution of iron because their effective binding constants (at pH 7.4) for Fe(III) are similar." @default.
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• W2063635354 date "1991-10-01" @default.
• W2063635354 modified "2023-10-02" @default.
• W2063635354 title "The interaction of hydroxypyridinones with human serum transferrin and ovotransferrin" @default.
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• W2063635354 doi "https://doi.org/10.1016/0162-0134(91)80058-p" @default.
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