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The p K a values for the three ionisable groups X, Y and Z of glutamic acid are 4.3 9.7 and 2.2 respectively. The isoelectric point for the amino acid is

Options

  1. A7.00
  2. B3.25
  3. C4.95
  4. D5.95

Correct answer

B. 3.25

Step-by-step solution

In acidic medium Isoelectric point = 4.3 + 2.2 2 = 3.25

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