Flashcards in Lecture 5 - Peptides and Peptide Bonds Deck (11):
Post-translational modifications of amino acids in proteins
What transports amino acids to the ribosome?
Why is the peptide bond (bond between the carboxyl group of one amino acid and the amine group of another amino acid) short?
Because the C-N bond has some double bond character (40%) due to resonance with the C=O group.
Torsion angle between alpha C and N
Torsion angle from C=O to alpha C
Torsion angle of the peptide bond
Which amino acid is found in the cis configuration?
Proline, due to its cyclical structure
How can you estimate the number of amino acid residues in a protein?
Dividing the molecular weight by 110
The number of peptide sequences possible is given by what formula?
(Number of possible AA's)^(peptide length)
Which nonpolar, aliphatic R group amino acid occurs the most in proteins?