MV belongs to the Beta herpesvirinae subfamily of Herpesviridae which includes herpes simplex virus types 1 and 2, varicella-zoster virus, and Epstein-Barr virus. The herpesviruses share a characteristic ability to remain latent over long periods.CMV is a double-stranded linear DNA virus with 162 hexagonal protein capsomeres surrounded by a lipid membrane. CMV has the largest genome of the herpes viruses, ranging from 230-240 kilobase pairs. Human CMV is composed of unique and inverted repeats that include the existence of 4 genome isomers caused by inversion of L-S genome components (class E). Replication may be divided into immediate early, delayed early, and late gene expression based on time of synthesis after infection. The DNA is replicated by rolling circles. In vitro, CMV replicates in human fibroblasts.
The E.Coli derived recombinant artificial mosaic protein contains the CMV gB immunodominant regions 11-67 amino acids, fused with a 26 kDa GST Tag, the protein weight is 6.5kDa, having a total weight of 32.5 kDa.