Download TUTORIAL 4 – ASID AMINO DAN PROTEIN Draw the general

TUTORIAL 4 – ASID AMINO DAN PROTEIN
1.
Draw the general chemical structure of amino acids.
2.
Give two examples from each classes of amino acids:
a. Hydrophobic
b. Polar, uncharged
c. Polar, charged
3.
Answer the following questions:
a. Name one amino acid that have aromatic ring.
b. Which amino acid that can form disulfide bond.
c. Which amino acid that actually is an imino acid.
d. What is the smallest amino acid?
e. What is the largest amino acid?
4.
Give the full name for each abbreviation of amino acid below:
a. Asn
b. Asp
c. Arg
d. W
e. Q
f. Y
5.
Calculate the isoelectric pH or pI of aspartic acid that has pK1 = 2.09 and pK2 = 3.96.
6.
Give an example for each protein function below.
a. Oxygen transport
b. Oxygen storage
c. Electron transport
d. Enzyme
e. Structural proteins
f. Regulatory or receptors proteins
g. Immune proteins
h. Muscle contraction
7.
Draw a structure of dipeptide. Show the peptide bond.
8.
Describe what globular and fibrous proteins are. Give two examples for each type of
proteins.
9.
Name and describe the four levels of proteins structures.
10.
Polypeptide chains in b configuration can combine to form -sheet in two possible
orientations. Explain this statement by drawing the schematic structure of both sheets.