Deprotonation constants for

Table II. Cumulative and Stepwise Stability and Deprotonation Constants for Cu(II)—Peptide Complexes0...

Calculation of the binding constants for patellamide A (1) was quite straightforward as only three sequential states had to be considered. These were unbound, singly bound and doubly bound and it was assumed that this took place in the manner shown below and that there was no difference in the two binding sites available. Although deprotonation of the peptide occurs prior to inclusion of the metal at each step, as shown in equations 1-3 (2" deprotonation not included), this could not be incorporated into the calculation as there are no deprotonation constants for amides available. ... 

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