[Isolation of a panel of HIV-positive serum by blocking them with various HIV antigens]

A new methodological approach to preparation of a panel of positive sera containing antibodies to individual viral proteins has been developed. The method consists in exhaustion of initial sera from HIV-infected patients with the known titers of antibodies by HIV antigens differing by the spectrum of virus proteins. Antigen preparations containing the least amounts of envelope proteins were selected for exhaustion. A set of HIV-positive sera containing antibodies mainly to envelope proteins and differing in ELISA was obtained.