Schematic representation of the protein composition of mature extracellular MuHV-4 virions.

Capsid proteins are represented as hexagons, tegument proteins as circles, envelope proteins as triangles. As the location of the M3 protein is unknown, it is represented as a putative structural protein (square). The predicted protein mass is directly proportional to their surface. The mean relative abundance (emPAI) determined by the different analyses of complete virions is indicated in color intensity (see scale).