VZV ORF23 encodes a 24 kDa small capsid surface protein that localizes primarily to cell nuclei during infection and is not essential for viral replication in cell culture, even though its absence disrupts the capsid assembly.
M45 is a 97-kDa virion-associated protein encoded by mouse cytomegalovirus (MCMV) (Krause et al., 2014, Journal of Virology, 88(17), 9963–9975; Rawlinson et al., 1996, Journal of Virology, 70(10), 8833–8849).
pUL89 is highly conserved 75-kDa protein. It is a small terminase subunit of Human cytomegalovirus (HCMV) able to cleave viral DNA into unit-length genomes of appropriate length for encapsidation.
Murine cytomegalovirus immediate-early 1 (IE1, pp89, m123) is one of the first proteins expressed during productive (lytic) infection as well as during reactivation from the latency.