Biochemistry
Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Concept explainers

Nitrogen metabolism
Nitrogen metabolism is the synthesis, utilization or uptake, breakdown, and excretion of nitrogenous compounds in the body. The nitrogen metabolism encompasses nitrogen fixation, biosynthesis, and the breakdown of amino acids, purines, and pyrimidine. Si…
Question
Consider the following tetrapeptide, written in a sequence according to normal convention, from left to right: Residue 1 is acidic; Residue 2 is proline (a large hydrophobic amino acid); Residue 3 is cysteine (an amino acid containing a -CH2SH R-group); Residue 4 is basic. Which of the following four general statements is TRUE regarding this tetrapeptide? This tetrapeptide probably is not part of an alpha-helix, since the large size of the proline would disrupt the consistency of the spiral shape. Residue 3 belongs to the amino acid category known as "basic." This tetrapeptide has the ability to form a disulfide linkage with an identical tetrapeptide. The acidic residue (Residue #1) is at the amino terminus of this tetrapeptide. 3 of these 4 responses are correct
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Transcribed Image Text:Consider the following tetrapeptide, written in a sequence according to normal convention, from left to right: Residue 1 is acidic; Residue 2 is proline (a large hydrophobic amino acid); Residue 3 is cysteine (an amino acid containing a -CH2SH R-group); Residue 4 is basic. Which of the following four general statements is TRUE regarding this tetrapeptide? This tetrapeptide probably is not part of an alpha-helix, since the large size of the proline would disrupt the consistency of the spiral shape. Residue 3 belongs to the amino acid category known as "basic." This tetrapeptide has the ability to form a disulfide linkage with an identical tetrapeptide. The acidic residue (Residue #1) is at the amino terminus of this tetrapeptide. 3 of these 4 responses are correct
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