ALDH2 and ALDH1B1 subunit-subunit docking results. Predicted three-dimensional ALDH2 and ALDH1B1 subunit-containing tetrameric structures. Trimer (ALDH2 and ALDH1B1) subunits are shown in yellow, red and purple. The monomer (ALDH2, ALDH2*2 or ALDH1B1), which completes the tetramer in the docking studies, is shown in green. The top-right and bottom-left subunits form a dimer (green and yellow), as do the top-left and bottom-right subunits.