Full text not available. This article's full text was not recovered in the archive. The citation and links above point to the published record. Related research Journal of General Virology 92(4):841 Journal of General Virology Journal of General Virology 92(4):860 Journal of General Virology Journal of General Virology 92(4):893 Journal of General Virology Journal of General Virology 92(4):768 Journal of General Virology Journal of General Virology 92(4):784 Journal of General Virology Journal of General Virology 92(4):789 Journal of General Virology ← Previous article in this issueMapping of a neutralizing epitope in the surface envelope protein of porcine endogenous retrovirus subgroup B