Amino acid sequence comparison of the E proteins of seven MHV strains. The deduced MHV-1, MHV-2, MHV-3, and MHV-DVIM E sequences were determined in the present work. The E sequences of MHV-A59 (8), MHV-JHM (40), and MHV-S (31, 46) have been reported previously (GenBank accession numbers M16602, X04997, and M64835, respectively). Spaces in the alignment indicate positions at which the amino acid is identical to that of MHV-A59; dots denote every 10th residue.