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Table 1 Frequencies of signature nucleotides identified in the 5'NCR of type 1 HCV strains isolated in South Americaa

From: Evolution of naturally occurring 5'non-coding region variants of Hepatitis C virus in human populations of the South American region

  Frequency of query nucleotides Frequency of background nucleotides
Positionb: 107 243 247 248 107 243 247 248
Nucleotide: A A T C G G C T
Among query set: 0.947 0.947 0.947 0.947 0.053 0.053 0.053 0.053
Among background set 1: 0.000 0.421 0.000 0.000 1.000 0.579 1.000 1.000
Among background set 2: 0.000 0.316 0.105 0.105 1.000 0.684 0.895 0.895
Among background set 3: 0.158 0.368 0.000 0.000 0.842 0.632 1.000 1.000
  1. a Background sets 1, 2 and 3 are composed by type 1 HCV strains isolated in South America, Europe and North America, respectively.
  2. b Numbers refer to nucleotide sequence position relative to strain HCV1b sequence [14].