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).
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- 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。