The F2/F1 cleavage site in carboxyl terminus of F2 protein is Lys -Pro -Ala -Ser -Arg, which is similar to that of Murayama virus (Lys -Pro -Thr -Ala -Arg).

• F2蛋白羧基端裂解位点区的氨基酸残基序列为Lys-Pro-Ala-Ser-Arg。