contains myristoylated residue iron containing modified residue manganese containing modified residue tetrakis-L-glutamato bis-L-N1'-histidino lipid carboxylato manganese iron oxide 1140.325927734375 1140.8499755859375 350.037689208984375 350.1099853515625 MOD:01443 PSI-MOD C 14 H 23 O 3 Mn 1 Fe 1 1- A protein modification that effectively converts four L-glutamic acid residues and two L-histidine residues to tetrakis-L-glutamato bis-L-N1'-histidino lipid carboxylato manganese iron oxide. natural none C 46 H 65 N 10 O 17 Mn 1 Fe 1 Cross-link 6. It is not clear whether the lipid carboxylate is a cofactor or a substrate, and its identity is not certain. It was modeled as myristic acid [JSG]. E, E, E, E, H, H metal or metal cluster coordinated L-glutamic acid residue metal or metal cluster coordinated L-histidine residue