Question: 1. The basic groups in the side chains of His and Lys have pKh values of 7.9 and 3.5 respectively. a) calculate the values of

1. The basic groups in the side chains of His and Lys have pKh values of 7.9 and 3.5 respectively. a) calculate the values of the basicity constants Kh b) give equations to show the equilibria to which they refer c) What effect does this have on the protonation states of these amino acids at pH7.0 ? d) How would these amino acids react with Cu2+(aq) at pH7.0 ? Suggest the reaction equations 2. Draw the structure of a complex formed by Zn2+ and (a) two histidines, one glutamic acid (bidentate) and a water molecule. (b) two histidines, one asparagine, one aspartic acid (monodentate) Describe the coordination numbers and the geometries of the complexes 3. Draw a step-by-step mechanism for the hydrolysis of the following dipeptide catalyzed by carboxypeptidase A. Use the template. Describe what is happening in each step

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