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Biochem Lecture 3

Review of Amino Acids

QuestionAnswer
Amino acids of what form are used for protein synthesis? L (Alpha-amino group is on the left)
Triptophan contains a _______ sidechain Non-polar
Isoleuceine contains a _________ sidechain Non-polar
Proline contains a ________ sidechain Non-polar
The side chains of amino acids with nonpolar hydrocarbon groups cluster with each other via _________. Hydrophobic interactions
Asparagine contains a ________ sidechain. Polar
Threonine contains a __________ sidechain. Polar
Cysteine contains a __________ sidechain. Polar
Polar side chains can form _________ bonds with each other. Hydrogen
Which amino acid can form disulfide bonds with itself? Cysteine
Which amino acids can phosphorolate? Serine, Threonine and Tyrosine
Which amino acids can undergo glycosylation? Serine, Threonine and Asparagine
Glycosylation occurs before or after translation of a protein? After
Arginine and Lysine will _______ be protonated in the body. Always
Glutamate and Aspartate will ________ be protonated in the body. Never
Which amino acid is a good buffer in the blood? Histidine
Basic and acidic amino acids can form _______ bonds. Ionic
What are the 7 amino acids that have ionizable side chains? Arg, Lys, His, Asp, Glu, Cys, and Tyr
What do you call the pH at which the net charge of a compound (in this case an amino acid) is zero pI (Isoelectric Point)
When the pH is greater than pI the net charge is _________. negative
For amino acids with a positive and negative charge (zwitterionic) the pI is the average of _______. The 2 pKa values
For amino acids with charged R groups the pI is the average of ________. The 2 pKa values that flank the neutral form of the amino acid.
Created by: chilangberto