7.The pKa values for a-COOH, a-NH2, and side chain COOH groups of glutamate is 2.19, 9.67 and 4.25, respectively. At pH of 3.22, glutamate is predominantly A. positively charged B. negatively charged C. both A and B D. neither A nor B 8. What is the charge on the tetrapeptide KNDE at pH 14? A. 0 B. +1 C. +2 D. +3 E. -1 F. -2 G. -3

Q: -11 -12 13 1. 14 2 15 16 3- 4 -17 18 -19 6 -20 7- -21 OBDES 9. -22 10 23

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