Exhibit 3A (for this chapter) Amino acid ?-carboxyl group pKa ?-amino group pKa R-group pK Ala 2.3 9.7 Arg 2.2 9.0 12.5 Asn or Gln 2.1 9.0 Asp or Glu 2.2 9.8 4.0 Cys 1.7 10.8 8.3 His 1.8 9.2 6.0 Ser 2.2 9.2 Tyr 2.1 9.1 10.1 Refer to Exhibit 3A. Which one has a pI of 5.0? a. Alanine b. Cysteine c. Arginine d. Histidine e. Glutamic acid
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Step 1: Calculate the average pKa value for alanine using the formula: (pKa1 + pKa2) / 2 Show more…
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