Maximum likelihood phylogenetic trees including partial HCV-1g sequences. Four regions were studied (a) 5'UTR, (b) core, (c) E1 and (d) NS5B. Only genotype 1 clade is shown. Support value of nodes was estimated by bootstrap (1000 replicates using neighbour joining with maximum likelihood distance). Only values >75% are shown. Bar represents in each case number of substitutions per nucleotide position. Patient code label (in parenthesis), genotype and subtype labels (in bold) are next to accession numbers. The sequence obtained in this study is underlined. Country names are CA, Canada; EG, Egypt; ES, Spain; LB, Lebanon and SD, Sudan.