Fig. 1: Crystal structure of OaPAC.

Ribbon diagram of OaPAC (pdb:4yut) showing the BLUF and AC domains as well as the α3BLUF helices, the handles and the β4AC-β5AC central tongue discussed in the text.

Ribbon diagram of OaPAC (pdb:4yut) showing the BLUF and AC domains as well as the α3BLUF helices, the handles and the β4AC-β5AC central tongue discussed in the text.