Figure 2

Molecular models of β- N -acetylhexosaminidase from Aspergillus oryzae. The models show the shape of the catalytic subunit from a side view (A) and a top view (B) with the active site at the C-terminal face of the (β, α)₈-barrel, and the arrangement of these subunits in the fully N-glycosylated dimer (C). The large flexible loop (D: side view, E: top view, shown in yellow) of the green monomer is just about 1 nm above the active site residues (shown in grey) of the red monomer.