#Question id: 170
#XL - T Zoology
Desmosine, an uncommon amino acid is derived from
#Question id: 171
#XL - T Zoology
An amino acid with two chiral carbon atoms
#Question id: 172
#XL - T Zoology
Which amino acid is least likely to participate in acid-base catalysis?
#Question id: 175
#XL - T Zoology
The ionic charges associated with a protein molecule are ________.
#Question id: 176
#XL - T Zoology
A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3
#Question id: 177
#XL - T Zoology
The titration curve of alanine shows the ionization of two functional groups with pKa values of 2.34 and 9.69, corresponding to the ionization of the carboxyl and the protonated amino groups, respectively. The titration of di-, tri-, and larger oligopeptides of alanine also shows the ionization of only two functional groups, although the experimental pKa values are different. The trend in pKa values is summarized in the table. Which of the following is a reason for this shift in pK values