(18)O label at both C-terminal oxygens
(16)O -2 (18)O 2
4.00849
4.01
A protein modification that effectively substitutes two (18)O atom for the two (16)O atoms of an alpha-carboxyl (1-carboxyl) group.
C-term
Label:18O(2)
MOD:00546
O18 label at both C-terminal oxygens
PSI-MOD
Unimod:193
X
artifact
ctermpepdio18
(18)O disubstituted residue