Abstract: Amino acid substitutions (
D32N/E,
E36Q,
H85Y, and
E120D in
E6 and
N29H/S and
R77C in
E7) were predicted to have an effect on conserved structural and functional residues, and five amino acid substitutions (
H85Y,
E36Q,
I34L, and
D32E in
E6;
R77C in
E7) would potentially change the secondary structure.