.The structure depicted below is that of protonated L-glutamic acid 3 oAssign the pKa values given to three functional.groups in this molecule b.Draw the structure of this amino acid at

pH=1.pH=3, pH=7, ph 11 Estimate the net charge (average charge) of this amino acid at ph =4.5 One of the intermediates of the TCL cycle is the symmetrical molecule succinate sketch a potential energy diagram (energy vs torsion angle ) for succinate considering rotation about the bond shown in bold For each local energy minimum and maximum: Draw the conformation using a Newman projection Briefly identify any stabilizing and destabilizing interactions in each conformation. e. Thermodynamic studies indicate that the energy difference between conformations varies according to pH. Predict how the stability of the syn periplanar conformation changes as a function of pH.[3]