What Is the PI of Phenylalanine (PK_a1 = 1

question 62

Multiple Choice

What is the pI of phenylalanine (pK_a1 = 1.8; pK_a2= 9.1) ?

• A)2.3
• B)1.8
• C)5.5
• D)9.1
• E)10.9

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