8DH5|1|B|MG|902 MG ion 8DH5|1|E|MG|902 MG ion 8DH5|1|B|ATP|901 ATP rna 8DH5|1|E|ATP|901 ATP rna 8DH5|1|I|ATP|901 ATP rna 8DH5|1|M|ATP|901 ATP rna