Summary of the nucleotide alternations in pX nucleotide.

(A) All nucleotide alternations are shown in the upper column. (B) Nucleotide alternations that alter the amino acid in Tax protein are shown in the middle column. (C) Nucleotide alternations that alter the amino acid in Rex protein are shown in the lower column.X-axis: Nucleotide position. Y-axis: Number of times alternation is observed in a nucleotide position. Dotted bar at nucleotide position 7337 in HCs represents a mixture of this alternation with the wild-type nucleotide.