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To reduce the embryonic pathogenicity of Newcastle disease virus (NDV), escape mutants of the La Sota strain were produced with selected monoclonal antibodies. Immunoselection resulted in the elimination of an epitope by single amino acid substitution (F and HN molecule) or in a conformational change (HN molecule). The embryonic pathogenicity of these escape mutants was reduced and their dose was...
During the screening of a Trypanosoma brucei brucei (T. b. brucei) cDNA library constructed from bloodstream form mRNA, we identified a 2.3kb cDNA encoding a proteasome beta subunit (ORF1) and a putative zinc finger protein (ORF2). Northern blot analysis indicated the presence of a digenic transcript as well as the two individual messengers in both procyclic and bloodstream forms of the parasite....
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