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- W2008794986 abstract "Serum albumin is known to bind several divalent metal ions at the amino terminus of the protein. Two peptide analogues for the amino terminus of human albumin, L-aspartyl-L-alanyl-L-histidine-N-Methyl amide (AAHNMA) and glycylglycyl-L-histidine-N-methyl amide (GGHNMA) have been synthesized, and their interactions with Zn(II) and Co(II) ions have been studied using analytical potentiometry. The stability constants of the species and their distribution as a function of pH were determined in 0.16-M KNO3 at 25°. Comparison of the modes of interaction of the Zn(II) and Co(II) with each of the above peptides indicate that, although Co(II) is a valuable tool for the study of Zn(II) interaction with metalloenzymes, it is considerably less useful as a Zn(II) model with small peptide molecules. The potentiometric properties of the two peptide-Zn(II) systems have been compared to the potentiostatic properties of the albumin-Zn(II) system. The results indicate that AAHNMA is a better analogue for the Zn(II)-HSA interaction than is GGHNMA. The findings suggest that the Zn(II)-HSA binding site is best described as a compound site containing both a histidyl and a neighboring carboxyl group." @default.
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- W2008794986 date "1979-01-01" @default.
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- W2008794986 title "Equilibrium studies of zinc(II) and cobalt(II) binding to tripeptide analogues of the amino terminus of human serum albumin" @default.
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- W2008794986 doi "https://doi.org/10.1016/s0162-0134(00)80185-3" @default.
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