Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 3, Problem 45RE
Interpretation Introduction
Interpretation:
The property of peptides and proteins in the absence of sulfur-containing amino acid is to be interpreted.
Concept introduction:
Peptides are the
A simple amino acid contains a carboxylic group, a hydrogen atom, a side chain (R group), and an amino group. Cysteine is the amino acid that contains sulfur in its side chain.
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Chapter 3 Solutions
Biochemistry
Ch. 3 - RECALL How do D-amino acids differ from L-amino...Ch. 3 - RECALL Which amino acid is technically not an...Ch. 3 - RECALL For each of the following, name an amino...Ch. 3 - RECALL Identify the polar amino acids, the...Ch. 3 - RECALL Identify the nonpolar amino acids and the...Ch. 3 - RECALL Are amino acids other than the usual 20...Ch. 3 - MATHEMATICAL Predict the predominant ionized forms...Ch. 3 - MATHEMATICAL Draw structures of the following...Ch. 3 - MATHEMATICAL Predict the predominant forms of the...Ch. 3 - MATHEMATICAL Calculate the isoelectric point of...
Ch. 3 - MATHEMATICAL Sketch a titration curve for the...Ch. 3 - MATHEMATICAL Sketch a titration curve for the...Ch. 3 - MATHEMATICAL An organic chemist is generally happy...Ch. 3 - MATHEMATICAL Sketch a titration curve for aspartic...Ch. 3 - REFECT AND APPLY Suggest a reason why amino acids...Ch. 3 - REFECT AND APPLY Write equations to show the ionic...Ch. 3 - REFECT AND APPLY Based on the information in Table...Ch. 3 - REFECT AND APPLY If you were to have a mythical...Ch. 3 - REFECT AND APPLY What would be the pI for the...Ch. 3 - REFECT AND APPLY Identify the charged groups in...Ch. 3 - REFECT AND APPLY Consider the following peptides:...Ch. 3 - REFECT AND APPLY In each of the following two...Ch. 3 - REFECT AND APPLY Could the amino acid glycine...Ch. 3 - RECALL Sketch resonance structures for the peptide...Ch. 3 - RECALL How do the resonance structures of the...Ch. 3 - REFECT AND APPLY Would the peptide group be planar...Ch. 3 - Prob. 27RECh. 3 - REFECT AND APPLY Consider the peptides...Ch. 3 - REFECT AND APPLY Would you expect the titration...Ch. 3 - REFECT AND APPLY What are the sequences of all the...Ch. 3 - REFECT AND APPLY Answer Question 30 using...Ch. 3 - REFECT AND APPLY Most proteins contain more than...Ch. 3 - REFECT AND APPLY If the amino acids alanine and...Ch. 3 - Prob. 34RECh. 3 - REFECT AND APPLY Would the presence of a chiral...Ch. 3 - REFECT AND APPLY What might you infer (or know)...Ch. 3 - Prob. 37RECh. 3 - REFECT AND APPLY Suggest a reason why the amino...Ch. 3 - REFECT AND APPLY Consider the peptides...Ch. 3 - Prob. 40RECh. 3 - Prob. 41RECh. 3 - REFECT AND APPLY You are studying with a friend...Ch. 3 - Prob. 43RECh. 3 - REFECT AND APPLY Suggest a reason (or reasons) why...Ch. 3 - Prob. 45RECh. 3 - REFECT AND APPLY Speculate on the properties of...Ch. 3 - RECALL What are the structural differences between...Ch. 3 - RECALL How do the peptide hormones oxytocin and...Ch. 3 - RECALL What is the role of the disulfide bond in...Ch. 3 - RECALL Is it possible to form cyclic peptides...Ch. 3 - Prob. 51RECh. 3 - RECALL What types of experiments led to evidence...Ch. 3 - Prob. 53RECh. 3 - THOUGHT QUESTION Imagine we identify a gene that...
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- RECALL Is it possible to form cyclic peptides without bonds between side chains of the component amino acids?arrow_forwardREFECT AND APPLY Consider the peptides GlyProSerGluThr(open chain) and GlyProSerGluThr with a peptide bond linking the threonine and the glycine. Are these peptides chemically the same?arrow_forwardREFECT AND APPLY Consider the peptides SerGluGlyHisAlaandGlyHisAlaGluSer. How do these two peptides differ?arrow_forward
- REFLECT AND APPLY A sample of an unknown peptide was divided into two aliquots. One aliquot was treated with trypsin; the other was treated with cyanogen bromide. Given the following sequences (N-terminal to C-terminal) of the resulting fragments, deduce the sequence of the original peptide. Trypsin treatment AsnThrTrpMetIleLysGlyTyrMetGlnPheValLeuGlyMetSerArg Cyanogen bromide treatment GlnPheValLeuGlyMetIleLysGlyTyrMetSerArgAsnThrTrpMetarrow_forwardREFLECT AND APPLY The structures of tRNAs contain several unusual bases in addition to the typical four. Suggest a function for the unusual bases.arrow_forwardRECALL Are amino acids other than the usual 20 amino acids found in proteins? If so, how are such amino acids incorporated into proteins? Give an example of such an amino acid and a protein in which it occurs.arrow_forward
- REFLECT AND APPLY Suggest an explanation for the observation that when proteins are chemically modified so that specific side chains have a different chemical nature, these proteins cannot be denatured reversibly.arrow_forwardRECALL Sketch resonance structures for the peptide group.arrow_forwardREFLECT AND APPLY Glycine is a highly conserved amino acid residue in proteins (i.e., it is found in the same position in the primary structure of related proteins). Suggest a reason why this might occur.arrow_forward
- REFLECT AND APPLY Why do amino acids other than methionine occur in the N-terminal position of proteins from eukaryotes?arrow_forwardREFLECT AND APPLY A biochemistry student characterizes the process of cooking meat as an exercise in denaturing proteins. Comment on the validity of this remark.arrow_forwardREFLECT AND APPLY Compare the information in the sequence of monomers in a polysaccharide with that in the sequence of amino acid residues in a protein.arrow_forward
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