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Glutamic acid (pK1 = 2.0, pK2 = 4.0, pK3 = 10.0) is dissolved in water. The...

Glutamic acid (pK1 = 2.0, pK2 = 4.0, pK3 = 10.0) is dissolved in water. The isoelectric point (pI) of glutamic acid is

A. 2.0

B. 3.0

C. 4.0

D. 7.0

E. 10.0

0 0
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