Alignment of the partial amino acid <i>env</i> sequences from 44 BLV isolates.

<p>All newly found substitutions are marked with light grey fields. The labeled rectangles in the upper part of figure refer to the coding sequences of antigenic determinants and the black frame on alignment refer to the Zinc-binding peptide. The localization of 4, 7 and 8 BLV genotypes is represented by the black bars in the right part of figure. Dots indicate identity with BLV_FLK (M35242.1), which was used as reference in this work.