Figure 1.

Dendrogram constructed using the neighbour joining method from 64 gag sequences obtained from replication competent virus activated from resting CD4⁺ T cells from the patient donor. Branch lengths as indicated by the scale bar represent the p-distance between sequence pairs. Grey boxes represent isolates which could not be distinguished using their gag sequence alone. The pink box highlights eight viruses with identical gag sequences which could not be discriminated by sequencing env. The dots are coloured according to the key to show date of sampling. There is no apparent clustering by time of sampling.