4'-(S-L-cysteinyl)-L-tryptophyl quinone (2R)-2-amino-3-[(3-[(2S)-2-amino-2-carboxyethyl]-6,7-dioxo-6,7-dihydro-1H-indol-4-yl)sulfanyl]propanoic acid 27.958528518676757812 27.969999313354492188 3-(2-amino-2-carboxyethyl)-4-[2-amino-2-carboxyethyl]sulfanyl-6,7-indolinedione 317.047027587890625 317.32000732421875 4'-(L-cystein-S-yl)-L-tryptophyl quinone 4-(S-cysteinyl)tryptophan-6,7-dione A protein modification that effectively cross-links an L-cysteine residue and an L-tryptophan residue by a thioether bond to form 4'-(S-L-cysteinyl)-L-tryptophyl quinone. C 0 H -4 N 0 O 2 S 0 C 14 H 11 N 3 O 4 S 1 C, W CROSSLNK 4'-cysteinyl-tryptophylquinone (Cys-Trp) CTQ Cross-link 2; secondary to RESID:AA0148. MOD:00318 PSI-MOD cysteine tryptophylquinone natural uniprot.ptm:PTM-0041 thioether crosslinked residues crosslinked L-tryptophan residue