Conceptual translation of ORF2. Single underline,
predicted transmembrane helix (41, 42); double underline, predicted
coiled coil (39, 40); dotted underline, proline-rich region; bold,
consensus of predicted α-helices (35–38); wavy underline, possible
fusion peptide. ORFs were generated as described (32). See Fig. 3 for
amino acid designations.