Predict the isoelectric point for tyrosine,4-OHC₆H₄CH₂CH(NH₂)CO₂H,given pKa₁ = 2.2 and pKa₂ = 9.1.

Name: Predict the isoelectric point for tyrosine,4-OHC 6 H 4 CH 2 CH(NH 2 )CO 2 H,given pKa 1 = 2.2 and pKa 2 = 9.1.
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Question

Quizplus · Accepted Answer

The isoelectric point (pI) is calculated as the average of the pKa values of the carboxyl and amino groups for amino acids without ionizable side chains. For tyrosine, pI = (pKa1 + pKa2) / 2 = (2.2 + 9.1) / 2 = 5.65, which rounds to 5.7.

Predict the Isoelectric Point for Tyrosine,4-OHC6H4CH2CH(NH2)CO2H,given PKa1 = 2

Predict the Isoelectric Point for Tyrosine,4-OHC₆H₄CH₂CH(NH₂)CO₂H,given PKa₁ = 2