1.14.13.234	structure of OxyS in complex with oxidized flavin to 2.6 A resolution. The monomeric OxyS is comprised of three structural domains, including the FAD-binding domain (residues 1-175 and 271-389), the middle domain (residues 176-270), and the C-terminal thioredoxin-like domain (residues 390?503). The tetracycline substrate is anchored in a narrow hydrophobic cleft at the interface between the FAD-binding and the middle domains