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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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