Influenza virus neuraminidase complexed with relenza Left: The enzyme is shown as strands. Relenza is space-filled The single N-acetyl glucosamine residue on each chain of the dimer is shown as ball and stick. Right: The enzyme is space filled showing the inhibitor at the active site in a cleft in the surface of the moleculeLeft: The enzyme is shown as strands. Relenza is space-filled. The single N-acetyl glucosamine residue on each chain of the dimer is shown as ball and stick. Right: The enzyme is space￾filled showing the inhibitor at the active site in a cleft in the surface of the molecule. Influenza virus neuraminidase complexed with Relenza