Fig. 3

Alignment of full-length of BLV env gene amino acid sequences (515 AA) between Chinese and reference strains. Chinese strains identified in this study are in red (cluster into genotype 4) and green (cluster into genotype 6). Numbers above the sequences are AA residue number indicated by the env gene of AB934282. The countries of the strains are marked with abbreviations in parentheses to the right of the GenBank accession numbers. Dots indicate amino acid identical to the reference sequence. Labeled lines and ▼ indicate the position of identified glycoproteins, conformational epitope (G), linear epitopes (A, B, D and E), CD4⁺ and CD8⁺ T cell epitopes, gp51N5, gp51N11 and gp51N12, peptides, neutralization domains (ND1 and ND2) and cytoplasmic domain of transmembrane protein. The BLV reference strains from GenBank have accession numbers AF933703 (G1), AF257515 (G2), EF065647 (G3), JN695878 (G4), EF065635 (G5), LC080656 (G6), KF801457 (G7), JQ675759 (G8), LC080659 (G9), and LC154066 (G10). The seven Chinese strains from this study have the accession numbers MK820044 and MK840875-MK840880. JPN = Japan; CHN = China; BRA = Brazil; ARG = Argentina; USA = United States of America; RUS = Russia; CRC = Costa Rica; PAR = Paraguay; MDA = Moldova; BOL = Bolivia; MYA = Myanmar