Muerhoff A, Simons J, Erker J, Desai S, Mushahwar I. Identification of conserved nucleotide sequences within the GB virus C 5'-untranslated region: design of PCR primers for detection of viral RNA. J Virol Methods. 1996;62:55-62 pubmed
..We describe the design and testing of PCR primers derived from conserved sequences within the 5'-UTR of the GBV-C genome. These primers were shown to be as effective as the helicase-derived primers in detecting GBV-C RNA in human sera. ..
Muerhoff A, Smith D, Leary T, Erker J, Desai S, Mushahwar I. Identification of GB virus C variants by phylogenetic analysis of 5'-untranslated and coding region sequences. J Virol. 1997;71:6501-8 pubmed
..Hence, substitutions at many nucleotide positions are not tolerated, so that substitutions at the positions which can change are saturated, thereby obscuring the evolutionary relationships. ..