Localisation of the RBC binding site.

<p>(<b>A</b>) An overall view of the Head in a space-filling representation (NTS region in mauve, DBL1α₁ domain in grey, CIDR1γ domain in orange) with the docked blood group A trisaccharide (green- carbon, black - oxygen and blue - nitrogen) and heparin (carbons in yellow) molecules in stick representation. (<b>B</b>) Detail of the RBC-binding site with side chains whose mutations affect binding highlighted (carbons in yellow, nitrogens in blue and oxygens in red).