crosslinked residues with loss of water oxazole/oxazoline ring crosslinked residues (Thr) L-serine 5-methyloxazoline-4-carboxylic acid -18.010564804077148438 -18.020000457763671875 170.0691375732421875 170.1699981689453125 2-[(1S)-1-amino-2-hydroxyethyl]-5-methyl-1,3-oxazoline-4-carboxylic acid 2-[(1S)-1-amino-2-hydroxyethyl]-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxylic acid 2-[(1S)-1-azanyl-2-hydroxyethyl]-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxylic acid A protein modification that effectively crosslinks an L-serine residue and an L-threonine residue to form L-serine 5-methyloxazoline-4-carboxylic acid. C 0 H -2 N 0 O -1 C 7 H 10 N 2 O 3 CROSSLNK 5-methyloxazoline-4-carboxylic acid (Ser-Thr) Cross-link 2. L-serine 5-methyloxazoline-4-carboxylic acid MOD:01904 PSI-MOD S, T natural uniprot.ptm:PTM-0465 crosslinked L-serine residue