5-LOX “corking” amino acids (bright blue, F177,Y181) are displaced relative to their counterparts F175, L179 in 15-LOX (lavender, 2P0M); F175, L179 in 12-LOX (gold, 3RDE); F184, A188 in 15-LOX-2 (green, 4NRE) and Y178, R182 in 8R-LOX (white). AA (white) and 12-LOX (orange) and 15-LOX-2 (pink) inhibitors are rendered in sticks. For reference, the catalytic iron (red sphere) and 5-LOX residues A603 and H600 are included.