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Detection of HIV-1 Nucleic Acids by Southern Blotting

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Replication of the human immunodeficiency virus type 1 (HIV-1) is associated with a high degree of viral sequence variation (1 ) that has been shown to correlate with disease state (2 8 ). The genetic diversity of the viral swarm within an HIV-1 infected individual is so extensive that this entity has been termed as quasi-species. Geographic distributions of HIV-1 reveal sequence clustering into a major group M and a minor (outlier) group O. Group M HIV-Is are further divided into a growing number of subtypes (A through H at this writing). Although DNA sequence analysis is the gold standard technique for HIV-1 genetic subtyping, molecular hybridization of untyped viral sequences with subtype-specific probes is frequently used as a subtyping screen.
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