| Sections | |||
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| Proteins and Amino Acids | 19 mins | 0 completed | Learn |
| L and D Amino Acids | 15 mins | 0 completed | Learn |
| Polar Amino Acids | 15 mins | 0 completed | Learn |
| Amino Acid Chart | 79 mins | 0 completed | Learn |
| Acid-Base Properties of Amino Acids | 33 mins | 0 completed | Learn |
| Isoelectric Point | 15 mins | 0 completed | Learn |
| Additional Practice |
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| Amino Acid Nomenclature |
What's a protein? Proteins are polypeptides that have some biological function.
The 20 most common amino acids all share the following traits:
- A. They are α-amino acids
- B. They have an L-(S)-configuration at the chiral carbon
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Videos in Proteins and Amino Acids
Concept #1: Peptides and Polypeptides
Concept #2: Standard Amino Acids
Additional Problems
Which of the following statements about peptide bonds are true? (a) A tripeptide contains three amino acid residues. (b) Peptide bonds are amide linkages. (c) A tetrapeptide contains five amino acid residues. (d) Peptides are polymers of proteins. (e) Peptide bond formation is a hydrolysis reaction.
Draw the resonance structure for the peptide bond below.Modify the molecule to show the resonance form. You can modify the molecule by moving, adding, deleting, or changing bonds or charges. You do not need to draw nonbonding electrons.
Draw the expected Edman degradation product of Lys-Gly-Met-Ala after one cycle What is the peptide obtained after this cycle?
What does the primary structure of a protein refer to? (i) The orientation of the side chains in three-dimensional space. (ii) The a-amino acid sequence in the polypeptide chain. (iii) The presence of cross-links with disulfide bonds. (iv) The presence of an alpha helix.
Which of the following terms best describes the side chain of valine?A. acidic B. basic C. charged, polar D. uncharged, polar E. nonpolar
The following compound is a(n) _____.a. monomer for polystyreneb. industrial solventc. amino acidd. vitamin