Abstract Binding Ni II to the terminal amine of a peptide depresses totally its nucleophilic character as measured by the rate constant of the reaction of the peptide with 4-nitrophenyl acetate. The structure of Ni II (GGGGG) in aqueous solutions was determined by this technique. The results indicate that the ratio of complexes in which the nickel is bound to four deprotonated peptide nitrogen atoms to those in which the nickel is bound to the ...
![2-[[2-[(2-acetamidoacetyl)amino]acetyl]amino]acetic acid Structure](https://image.chemsrc.com/caspic/434/52773-70-3.png)