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28-03-2024
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The pKa values for phenylalanine’s ionizable hydrogens are 1.83 (R—COOH) and 9.13 (R—NH3+). What is the isoelectric pH (pI) for phenylalanine?
A. 5.48
B. 7.00
C. 7.30
D. 2.56

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