Question: a. Which amino acid has the lowest pI value? b. Which amino acid has the highest pI value? c. Which amino acid has the greatest

a. Which amino acid has the lowest pI value?
b. Which amino acid has the highest pI value?
c. Which amino acid has the greatest amount of negative charge at pH = 6.20?
d. Which amino acid-glycine or methionine-has a greater negative charge at pH = 6.20?

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