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Mass values used in FindMod

Post-translational modifications

abbreviation monoisotopic average
Acetylation ACET 42.0106 42.0373
Alkylation ALKY 14.01564 14.02688
Amidation AMID -0.9840 -0.9847
Beta-methylthiolation BMTH 45.9877118 46.08688
Biotin BIOT 226.0776 226.2934
Bromination BROM 77.9105 78.9
Carbamylation CAM 43.00581 43.02502
Citrullination CITR 0.9840276 0.98476
C-Mannosylation CMAN 162.052823 162.1424
Cysteine sulfenic acid (-SOH) CSEA 15.9949146 15.9994
Cysteine sulfinic acid (-SO2H) CSIA 31.9898292 31.9988
Deamidation DEAM 0.9840 0.9847
N-acyl diglyceride cysteine (tripalmitate) DIAC 788.7258 789.3202
Dimethylation DIMETH 28.0314 28.0538
FAD FAD 783.1415 783.542
Farnesylation FARN 204.1878 204.3556
Formylation FORM 27.9949 28.0104
Geranyl-geranyl GERA 272.2504 272.4741
Gamma-carboxyglutamic acid GGLU 43.98983 44.0098
O-GlcNAc GLCN 203.0794 203.1950
Glucosylation (Glycation) GLUC 162.0528 162.1424
Glutathionylation GLUT 305.0680814 305.3056
Hydroxylation HYDR 15.9949 15.9994
Lipoyl LIPY 188.033 188.3027
Methylation METH 14.0157 14.0269
Myristoylation MYRI 210.1984 210.3598
S-Nitrosylation NTRY 28.99017 28.99816
N-Octanoate OCTA 126.1044 126.1986
Palmitoylation PALM 238.2297 238.4136
Phosphorylation PHOS 79.9663 79.9799
Pyridoxal phosphate PLP 229.014 229.129
Phosphopantetheine PPAN 339.078 339.3234
Pyrrolidone carboxylic acid PYRR -17.0266 -17.0306
Sulfation SULF 79.9568 80.0642
Trimethylation TRIMETH 42.0471 42.0807

Amino acids

monoisotopic average
Alanine (A) 71.03711 71.0788
Arginine (R) 156.10111 156.1875
Asparagine (N) 114.04293 114.1038
Aspartic acid (D) 115.02694 115.0886
Cysteine (C) 103.00919 103.1388
Glutamic acid (E) 129.04259 129.1155
Glutamine (Q) 128.05858 128.1307
Glycine (G) 57.02146 57.0519
Histidine (H) 137.05891 137.1411
Isoleucine (I) 113.08406 113.1594
Leucine (L) 113.08406 113.1594
Lysine (K) 128.09496 128.1741
Methionine (M) 131.04049 131.1926
Phenylalanine (F) 147.06841 147.1766
Proline (P) 97.05276 97.1167
Serine (S) 87.03203 87.0782
Threonine (T) 101.04768 101.1051
Tryptophan (W) 186.07931 186.2132
Tyrosine (Y) 163.06333 163.1760
Valine (V) 99.06841 99.1326

Mass differences due to amino acid substitutions: using average / monoisotopic mass values.

Other mass values

monoisotopic average
Carboxymethyl cysteine (Cys_CM) 161.01466 161.1755
Carboxyamidomethyl cysteine (Cys_CAM) 160.03065 160.1908
Pyridyl-ethyl cysteine (Cys_PE) 208.067039 208.284
Propionamide cysteine (Cys_PAM) 174.04631 174.2176
Methionine sulfoxide (MSO) 147.0354 147.1920
Homoserine Lactone (HSL) 100.03985 100.09714
H 1.00783 1.00794
H+ 1.00728 1.00739
O 15.9949146 15.9994
H2O 18.01056 18.01524

Last modified 07/Feb/2003 by ELG
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