# Molecular weights of amino acids # # Values from Expasy # # http://www.expasy.org/tools/findmod/findmod_masses.html # Mol Average Monoisotopic A 71.0788 71.03711 B 114.5962 114.53493 C 103.1388 103.00919 D 115.0886 115.02694 E 129.1155 129.04259 F 147.1766 147.06841 G 57.0519 57.02146 H 137.1411 137.05891 I 113.1594 113.08406 J 113.1594 113.08406 K 128.1741 128.09496 L 113.1594 113.08406 # If met gets oxidised to the sulphoxide replace by 147.1920 147.0354 M 131.1926 131.04049 N 114.1038 114.04293 O 237.3018 237.147727 P 97.1167 97.05276 Q 128.1307 128.05858 R 156.1875 156.10111 S 87.0782 87.03203 T 101.1051 101.04768 U 150.0388 150.953636 V 99.1326 99.06841 W 186.2132 186.07931 X 118.8860 118.80572 Y 163.1760 163.06333 Z 128.6231 128.55059 Hydrogen 1.00794 1.00783 Oxygen 15.9994 15.9949146 Water 18.01057 18.01528