S-[5'-(L-tryptoph-6'-yl)-L-tyrosin-3'-yl]-L-methionin-S-ium -3.0199999809265136719 -3.0234749317169189453 477.159637451171875 477.55999755859375 H -3 S-[5'-(L-tryptoph-6'-yl)-L-tyrosin-3'-yl]-L-methionin-S-ium MOD:00353 M, W, Y 5'-(6'-tryptophyl)-tyrosin-3'-yl-methionin-S-ium Cross-link 3. A protein modification that effectively cross-links an L-tryptophan residue with an L-tyrosine residue by a carbon-carbon bond, and cross-links the L-tyrosine residue to an L-methionine residue by a thioether bond to form S-[5'-(L-tryptoph-6'-yl)-L-tyrosin-3'-yl]-L-methionin-S-ium. 1+ none PSI-MOD C 25 H 25 N 4 O 4 S 1 natural uncategorized crosslinked residues crosslinked L-methionine residue crosslinked L-tryptophan residue crosslinked L-tyrosine residue