Biomedical Engineering Reference
In-Depth Information
Table 8.13.
Amino acids: code and molecular mass
Amino acid
Triple-
Single-
M
r
M
r
−H
2
OAA
letter
letter
code
code
Alanine
Ala
A
89.09
71.08
1
Arginine
Arg
R
174.20
156.19
2
Asparagine
Asn
N
132.12
114.11
3
Aspartic acid
Asp
D
133.10
115.09
4
Citrulline
175.19
157.18
Cysteine
Cys
C
121.16
103.15
5
Cystine
Cys
2
240.30
222.29
γ
-Carboxyglutamic
Gla
191.14
173.13
acid
Glutamic acid
Glu
E
147.13
129.12
7
Glutamine
Gln
Q
146.15
128.14
6
Glycine
Gly
G
75.07
57.06
8
Histidine
His
H
155.16
137.15
9
Homocysteine
135.19
117.18
5-Hydroxylysine
162.19
144.18
trans
-4-Hydroxyproline
Hyp
131.13
113.12
Isoleucine
Ile
I
131.17
113.16
10
Leucine
Leu
L
131.17
113.16
11
Lysine
Lys
K
146.19
128.18
12
Methionine
Met
M
149.21
131.20
13
Norleucine
Nle
131.17
113.16
Norvaline
Nva
117.15
99.14
Ornithine
Orn
O
132.16
114.15
Phenylalanine
Phe
F
165.19
147.18
14
Proline
Pro
P
115.13
97.12
15
Pyroglutamic acid
pGlu, Pyr
129.12
111.11
Selenocysteine
Sec
168.05
150.04
Serine
Ser
S
105.09
87.08
16
Statine
Sta
175.23
157.22
Threonine
Thr
T
119.12
101.11
17
Tryptophane
Trp
W
204.23
186.22
18
Tyrosine
Tyr
Y
181.19
163.18
19
Valine
Val
V
117.17
99.16
20
Asparagine or
Asx
B
132.65
114.64
21
aspartic acid
Glutamine or
Glx
Z
146.64
128.63
22
glutamic acid
Unknown amino acid
Xaa
X
144.56
126.55
23
