VZV ORF41 encodes a ~34 kDa protein that is packaged into the nucleocapsid core of the VZV virions together with protein products of ORFs 20, 21, 23, 33 and 40. By employing multiplex mRNA RT-PCR analysis, it has been shown that ORF41 belongs to the group of VZV genes latently expressed in trigeminal ganglia. Protein product of the VZV ORF41 plays a role in capsid morphogenesis by forming a 2:1 protein complex with capsid triplex subunit 1 thereby connecting nucleocapsid hexons and pentons in the VZV virions. Our anti-VZV ORF41 antibody VZ 41.01 works in ELISA (on immunogen) and each LOT is validated for Western blot of VZV infected cell lysates (described in J Virol. 2013 Jun;87(12):6943-54.).