Figure 2. Alignment of the amino acid sequence of the NIb proteins of PVY (Robaglia et al., 1989), TEV (Allison et al., 1986), BrSMV (Gotz and Maiss, 1995) with WSMV. Identical amino acid residues of WSMV-NIb with that of the other three viruses are boxed using BOXSHADE/DOS 2.7 software program. The numbers indicate the position of amino acids in the respective published sequence. The partial sequence of the NIb of WSMV published by Niblett et al., 1991 is represented by WSMV*.