heme P460-bis-L-cysteine-L-lysine 614.16162109375 614.469970703125 948.27496337890625 948.92999267578125 none natural C, C, K C 46 H 52 N 8 O 7 S 2 Fe 1 bis(S-cysteinyl)-N6-lysino-heme heme P460-bis-L-cysteine-L-lysine Cross-link 3. MOD:00276 BINDING Heme (covalent; via 3 links) A protein modification that effectively results from forming an adduct between two cysteine residues, a lysine residue, and the porphyrin compound heme b, (7,12-diethenyl-3,8,13,17-tetramethylporphyrin-2,18-dipropanoato)iron. PSI-MOD (19S,20S)-[7,12-bis((S)-1-[((R)-2-amino-2-carboxy)ethylsulfanyl]ethyl)-20-([(S)-5-amino-5-carboxypentyl]amino)-3,8,13,17-tetramethyl-21H,23H-19,20-dihydroporphine-2,18-bis(2-carboxyethyl)-N21,N22,N23,N24]-ferrate C 34 H 30 N 4 O 4 Fe 1 porphyrin modified residue metal or metal cluster coordinated L-cysteine residue metal or metal cluster coordinated L-lysine residue