Figure 3

Distribution of conserved sequence stretches on neuraminidase surface. Surface penetration of portions of the highly conserved sequences determined from Figure 2. Last 16 aa region corresponding to point F of Figure 2 is coloured blue. 16-aa segment corresponding to point A in Figure 2 is shown here in cherry red colour, that of point B in pink, point C in dark chocolate, point D in deep salmon and point E in orange. These are large stretches of which only parts are visible on the surface, but much lesser in extent than the last 16 aa stretch corresponding to point F of Figure 2.