Figure 7
From: Variability and conservation in hepatitis B virus core protein
Structural constraints and HBV diversity. The crystal structure formed by four HBVc subunits was displayed and coloured using RasMol software. The position of the amino acid identified as essential for virion formation (violet) or for both capsid and virion assembly (green) [23] are shown. The rest of the colour coding is as shown in fig 6.