Amino acids molecular weights:

Full name three letter code one letter code MW(Da)
alanine Ala A 89
arginine Arg R 174
asparagine Asn N 132
aspartic Asp D 133
cysteine Cys C 121
glutamic Gln E 146
glutamine Glu Q 147
glycine Gly 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