a, Overview of the central acyl-CoA binding tunnel. b-d, Acyl chain binding pocket. e, Conservation of active site tunnel. Molecular surface representation is coloured by amino acid conservation score calculated by CONSURF49 analysis of a diverse set of ELOV1-7 family members. The various subregions of the tunnel are indicated (ADP / Pan from CoA and Acyl chain). Amino acid residues that form the binding tunnel are coloured according to region (pink, acyl; blue, catalytic site; orange CoA binding). f, Cytoplasmic-facing CoA 3’-phospho ADP/pantothenic (Pan) binding pocket.