heme P460-bis-L-cysteine-L-tyrosine (10S,11S)-[7,12-bis((S)-1-[((R)-2-amino-2-carboxy)ethylsulfanyl]ethyl)-10-(2-hydroxy-5-[(S)-2-amino-2-carboxy]ethylphenyl)-3,8,13,17-tetramethyl-21H,23H-10,11-dihydroporphine-2,18-bis(2-carboxyethyl)-N21,N22,N23,N24]-ferrate 614.16162109375 614.47998046875 983.24334716796875 983.94000244140625 A protein modification that effectively results from forming an adduct between two cysteine residues, the C-3' of a tyrosine residue, and the porphyrin compound heme b, (7,12-diethenyl-3,8,13,17-tetramethylporphyrin-2,18-dipropanoato)iron. BINDING Heme (covalent; via 3 links) C 34 Fe 1 H 30 N 4 O 4 S 0 C 49 Fe 1 H 49 N 7 O 8 S 2 C, C, Y Cross-link 3. MOD:00271 PSI-MOD bis(S-cysteinyl)-(tyros-3'-yl)-heme heme P460-bis-L-cysteine-L-tyrosine natural porphyrin modified residue metal or metal cluster coordinated L-cysteine residue metal or metal cluster coordinated L-tyrosine residue