4PDB|1|I|A|14 s3O4' 4PDB|1|I|U|15 R3DSVS 4PDB|1|I|U|15 sO4'3 4PDB|1|I|A|14 R3DSVS 4PDB|1|I|C|20 sO4'3 4PDB|1|I|G|21 R3DSVS 4PDB|1|I|G|21 s3O4' 4PDB|1|I|C|20 R3DSVS