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After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. For each modified amino acid, identify the standard amino acid from which it is derived. Enter the unabbreviated name of the standard amino acid. OH I *NH,CH,C−CH,CH,—CH–COO C I H I *NH, Identify the modification that yields the first amino acid depicted. O: standard amino acid: addition of a hydroxyl group addition of an amino group modification of the existing amino group modification of the existing hydroxyl group elongation of the side chain by the addition of a -CH₂- group

After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. For each modified amino acid, identify the standard amino acid from which it is derived. Enter the unabbreviated name of the standard amino acid. OH I *NH,CH,C−CH,CH,—CH–COO C I H I *NH, Identify the modification that yields the first amino acid depicted. O: standard amino acid: addition of a hydroxyl group addition of an amino group modification of the existing amino group modification of the existing hydroxyl group elongation of the side chain by the addition of a -CH₂- group

Biochemistry
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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After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. For each modified amino acid, identify the standard amino acid from which it is derived. Enter the unabbreviated name of the standard amino acid. OH I *NH,CH,–C–CH,CH,—CH–COO H C *NH₂ standard amino acid: Identify the modification that yields the first amino acid depicted. addition of a hydroxyl group addition of an amino group modification of the existing amino group modification of the existing hydroxyl group elongation of the side chain by the addition of a -CH₂- group
Transcribed Image Text:After a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. For each modified amino acid, identify the standard amino acid from which it is derived. Enter the unabbreviated name of the standard amino acid. OH I *NH,CH,–C–CH,CH,—CH–COO H C *NH₂ standard amino acid: Identify the modification that yields the first amino acid depicted. addition of a hydroxyl group addition of an amino group modification of the existing amino group modification of the existing hydroxyl group elongation of the side chain by the addition of a -CH₂- group
+H₂N -O-P- -O- -CH₂-CH-COO- O- Identify the modification that yields the second amino acid depicted. modification of the a-amino group addition of a carboxyl group standard amino acid: removal of a -CH₂-group addition of a phosphate group
Transcribed Image Text:+H₂N -O-P- -O- -CH₂-CH-COO- O- Identify the modification that yields the second amino acid depicted. modification of the a-amino group addition of a carboxyl group standard amino acid: removal of a -CH₂-group addition of a phosphate group
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