ACT_SITE 151; /note="Charge relay system"; /evidence="ECO:0000305|PubMed:30846208, ECO:0007744|PDB:6JE8, ECO:0007744|PDB:6JEA, ECO:0007744|PDB:6JEB"; ACT_SITE 214; /note="Charge relay system"; /evidence="ECO:0000305|PubMed:30846208, ECO:0007744|PDB:6JE8, ECO:0007744|PDB:6JEA, ECO:0007744|PDB:6JEB"; ACT_SITE 279; /note="Charge relay system"; /evidence="ECO:0000269|PubMed:30846208, ECO:0007744|PDB:6JEB"