L 3 0Question 1The amino acid Asp is triprotic with pK₁ -1.88, pK₂-9.60, and pK; -3.65.What is the charge of the a-NH₂ functional group at pH 11? [Select]What is the net charge of Asp at pH 11? | Select]Question 2What is the isoelectric point (pl) for the dipeptide HKIF?For calculation of this question, use the pK, values found here: https://www.chem.ucalgary.ca/courses/351/Carmv5th/Ch27/27-1-42.htmleThe pka values for the N and C-termini are 8.00 and 4.00, respectively.Answers should have correct significant digits.

Answered: 0 Question 1 The amino acid Asp is…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Buffers are substances that maintains the PH of a medium by donating or accepting protons. Amino acids can act as buffers due to the presence of ionizable carboxyl and amino groups. Some of the amino acids have ionizable R groups along with the alpha amino and carboxyl groups. pKa1, pKa2, and pKa3 are the pKa values of alpha carboxyl, alpha amino, and R group respectively.