Glutamic Acid Contains Two Carboxylic Acid Groups (PK_a Values of 2.2

question 3

Multiple Choice

Glutamic acid contains two carboxylic acid groups (pK_a values of 2.2 and 4.2) and an amine group (pK_a 9.7) . What is the pI for glutamic acid?

• A)3.2
• B)6.0
• C)6.5
• D)7.0
• E)none of the above

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