1. Enumerate the 20 common amino acids. Draw their structure and separate them according to the 5 classes of amino acids.

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter22: Organic And Biological Molecules
Section: Chapter Questions
Problem 160CP
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QUESTIONS:
1. Enumerate the 20 common amino acids. Draw their structure and separate them
according to the 5 classes of amino acids.
2. Complete the following for serine, tyrosine, and gylcine.
a. Draw the amino acid.
b. Circle the side chain.
c. Identify whether it is polar, nonpolar, acidic, or basic.
d. Look for the pK₁, pk2, and PKR (if there an ionizable side chain)
e. At what pH will it exist as a zwitterion?
f. What is the range of pH values when it will be positively charged?
g. What is the lange of pH values when it will be negatively charged?
3. Identify the amino acids in the following peptides. Write it using the amino acid 3 letter
abbreviation and the one letter code nomenclature. (Ex. Phe-Tyr-Trp FYW)
A.
H₂N
Transcribed Image Text:QUESTIONS: 1. Enumerate the 20 common amino acids. Draw their structure and separate them according to the 5 classes of amino acids. 2. Complete the following for serine, tyrosine, and gylcine. a. Draw the amino acid. b. Circle the side chain. c. Identify whether it is polar, nonpolar, acidic, or basic. d. Look for the pK₁, pk2, and PKR (if there an ionizable side chain) e. At what pH will it exist as a zwitterion? f. What is the range of pH values when it will be positively charged? g. What is the lange of pH values when it will be negatively charged? 3. Identify the amino acids in the following peptides. Write it using the amino acid 3 letter abbreviation and the one letter code nomenclature. (Ex. Phe-Tyr-Trp FYW) A. H₂N
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