Abreviations and Molecular Weights for Amino Acids
Amino Acid
Three letter Code
One letter Symbol
Molecular Weight
(daltons)
Alanine
Ala
A
89
Arginine
Arg
R
174
Asparagine
Asn
N
132
Aspartic Acid
Asp
D
133
Asparagine or Aspartic Acid
Asx
B
--
Cysteine
Cys
C
121
Glutamine
Gln
Q
146
Glutamic Acid
Glu
E
147
Glutamine or Glutamic Acid
Glx
Z
--
Glycine
Glu
G
75
Histidine
His
H
155
Isoleucine
Ile
I
131
Leucine
Leu
L
131
Lysine
Lys
K
146
Methionine
Met
M
149
Phenylalanine
Phe
F
165
Proline
Pro
P
115
Serine
Ser
S
105
Threonine
Thr
T
119
Tryptophan
Trp
W
204
Tyrosine
Tyr
Y
181
Valine
Val
V
117