Three-dimensional similarity mapping reveals nucleotide sequence relationships among human immunodeficiency virus (HIV) isolates
1987
Abstract A method has been developed to compare and graphically display comparisons between many related nucleotide sequences. Principal coordinate analysis, a multidimensional scaling technique, was used to display DNA homology data in three dimensions. Using these methods, an analysis of the env , gag , and gag/pol overlapping regions of human immunodeficiency virus (AIDS virus) clearly demonstrates a clustering of North American isolates relative to African isolates. Elements of the latter group are dissimilar to one another and to the North America group. For the env region, the North American isolates can be resolved into two distinct groups.
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