A POLYMORPHIC MONOCLONAL ANTI-BOLA CLASS-I ANTIBODY

Cytotoxic monoclonal antibody IVA 44 was generated after the intraperi toneal immunization with peripheral blood mononuclear (PBM) cells and the boost by the intrasplenic inoculation of skin graft. The detected membrane antigen isolated by immunoprecipitation appears to be compose d of two subunits characteristic for the MHC class I molecules. The an tibody IVA 44 exhibited a different reactivity: it recognized the BoLA A14 (A8) specificity in animals typed in the Fifth BoLA workshop, whi le it reacted with all As positive animals including subtypes A14 and A15 in Czech and Slovak cattle. It is concluded that mAb IVA 44 might detect the broad subtype of As covering A14 and certain A15 split(s). The diverse A15 reactivity of this mAb in the workshop and our populat ion could be explained by the different occurrence of A15 splits in ba th populations.