This family groups together the viral proteins BLRF1, U46, 53, and UL73. The UL73-like envelope glycoproteins, which associates in a high molecular mass complex with its counterpart, gM, induce neutralising antibody responses in the host. These glycoprotein are highly polymorphic, particularly in the N-terminal region.
Jiyao W et al.(2023). "The conserved domain database in 2023.",