Figure 3 From: Viral cystatin evolution and three-dimensional structure modelling: A case of directional selection acting on a viral protein involved in a host-parasitoid interaction Graphic representation of variable selective pressures (ω) along the protein sequence. The * indicates a posterior probability greater than 95% of having ω > 1 and ** indicates a posterior probability greater than 99% of having ω > 1. Conserved amino acids implicated in the interaction with target proteases are indicated by arrows and are numbered according to the mature protein.Back to article page