– The heterodimer glycoprotein H-glycoprotein L is required for the fusion of viral and plasma membranes leading to virus entry into the host cell. Following initial binding to host receptor, membrane fusion is mediated by the fusion machinery composed of gB and the heterodimer gH/gL. May also be involved in the fusion between the virion envelope and the outer nuclear membrane during virion morphogenesis. Varicella-zoster virus (strain Oka vaccine) glycoprotein H/gH Protein (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 47 kDa and the accession number is Q775J3.