tris-L-cysteinyl L-arginyl diiron disulfide 172.7899932861328125 172.7916412353515625 2- 637.9202880859375 638.3900146484375 A protein modification that effectively converts three L-cysteine residues, an L-arginine residue and a two-iron two-sulfur cluster to tris-L-cysteinyl L-arginyl diiron disulfide. C 0 Fe 2 H -3 N 0 O 0 S 2 C 15 Fe 2 H 24 N 7 O 4 S 5 C, C, C, R Cross-link 4. METAL Iron-sulfur (2Fe-2S) MOD:00362 PSI-MOD di-mu-sulfido(N(eta1)-arginyl-S-cysteinyliron)(bis-S-cysteinyliron) natural tris-L-cysteinyl L-arginyl diiron disulfide iron-sulfur cluster containing modification metal or metal cluster coordinated L-cysteine residue metal or metal cluster coordinated L-arginine residue