Superposition of O. oeni Alr1 and Alr2 (PDB entries 3co8
, respectively). The Alr1 structure is shown in yellow and that of Alr2 in green. A two-stranded β-sheet that is only present in domain 2 of Alr2 is shown in red. The corresponding sequence in Alr1 is highlighted in blue and does not adopt a β-sheet conformation.