Type molecular weight Number in lysozyme
Alanine 89 12
Arginine 174 11
Asparagine 132 13
Aspartic acid 133 8
Cysteine 121 8
Glutamic acid 147 2
Glutamine 146 3
Glycine 75 12
Histidine 155 1
Isoleucine 131 6
Leucine 131 8
Lysine 146 6
Methionine 149 2
Phenylalanine 165 3
Proline 115 2
Serine 105 10
Threonine 119 7
Tryptophan 204 6
Tyrosine 181 3
Valine 117 6
1. The sequence of amino acids of the enzyme lysozyme is known. Below is a list of amino acids
and the number of each in the lysozyme molecule
Questions:
a. What is the average molecular weight of the 20 amino acids?
b. What is the molecular weight of lysozyme?
c. What is the average molecular weight of the amino acids in lysozome?
d. How many S-S bonds are possible in lysozyme?
(hint: look at the structures of each amino acid, and figure out which of these have sulphurs
that are FREE to form bonds).
e. Is the net charge on lysozyme positive or negative?
Type molecular weight Number in lysozyme
Alanine 89 12
Arginine 174 11
Asparagine 132 13
Aspartic acid 133 8
Cysteine 121 8
Glutamic acid 147 2
Glutamine 146 3
Glycine 75 12
Histidine 155 1
Isoleucine 131 6
Leucine 131 8
Lysine 146 6
Methionine 149 2
Phenylalanine 165 3
Proline 115 2
Serine 105 10
Threonine 119 7
Tryptophan 204 6
Tyrosine 181 3
Valine 117 6
1. The sequence of amino acids of the enzyme lysozyme is known. Below is a list of amino acids
and the number of each in the lysozyme molecule
Questions:
a. What is the average molecular weight of the 20 amino acids?
b. What is the molecular weight of lysozyme?
c. What is the average molecular weight of the amino acids in lysozome?
d. How many S-S bonds are possible in lysozyme?
(hint: look at the structures of each amino acid, and figure out which of these have sulphurs
that are FREE to form bonds).
e. Is the net charge on lysozyme positive or negative?