Amino acid Average MW Monoisotopic MW
     
A = Alanine 71.0788 71.03711
C = Cysteine 103.1448 103.00919
D = Aspartic Acid 129.1155 129.04259
E = Glutamic Acid 115.0886 115.02694
F = PhenylAlanine 147.1766 147.06841
G = Glycine 57.052 57.02146
H = Histidine 137.1412 137.05891
I = Isoleucine 113.1595 113.08406
J = PhosphoSerine 167.0782 167.0782
K = Lysine 128.1742 128.09496
L = Leucine 113.1595 113.08406
M = Methionine 131.1986 131.04049
N = Asparagine 114.1039 114.04293
O = PhosphoTyrosine 243.176 243.176
P = Proline 97.1167 97.05276
Q = Glutamine 128.1308 128.05858
R = Arginine 156.1876 156.10111
S = Serine 87.0782 87.03203
T = Threonine 101.1051 101.04768
U = PhosphoThreonine 181.1051 181.1051
V = Valine 99.1326 99.06841
W = Tryptophan 186.2133 186.07931
X = (S)-2(4'-pentenyl)Alanine 139.084 139.084
Y = Tyrosine 163.176 163.06333
Z = Norleucine 113.1595 113.08406