Figure 9From: Identification of novel subgroup A variants with enhanced receptor binding and replicative capacity in primary isolates of anaemogenic strains of feline leukaemia virusAcquisition of non-synonymous mutations in the envs of FeLV-A mutants following long-term culture. FEA cultures were infected with FeLV-A (Glasgow-1), or the DD, ND and NN mutants in the presence of pooled feline sera from FeLV-positive cats, anti-gp70 MAbs, or with no antibody (control). 50 days post-infection, env sequences were amplified from purified viral RNA, and their nucleic acid sequence were determined.Back to article page