– Envelope protein which probably plays a role in virus entry into the host cell. Is probably involved in the virus attachment to the host cell surface and associates with the entry/fusion complex (EFC). Needed for fusion and penetration of the virus core into host cell. Vaccinia virus (strain Western Reserve) L1 Protein (E. coli, His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 24.8 kDa and the accession number is P07612.