Immediate-early 62 protein (IE62) is a homolog of herpes simplex type 1 (HSV-1) ICP4. These two proteins have conserved DNA bidnding domain,while not activation domain (J Virol 1993. 67: 4246-4251). IE62 is the major VZV transactivator and contains a potent N-terminal acidic activation domain (J Virol 1993. 67: 4474-4483). This protein is a tegument protein expressed in latency and required for the viral growth in vitro (J Virol 1992. 66: 359-366). Our anti-VZV62 antibody VZ 62N.05 works in ELISA (on immunogen), IF (on VZV infected cells) and each LOT is validated for Western blot of VZV infected cell lysates, where it gives a pattern as described in J Virol. 2013 Jun;87(12):6943-54.