Virus strain

Amino acid site

80

91

93

101

103

323

564

FPV-CU4

K

A

K

I

V

D

N

FPV-XY1

K

S

K

T

V

D

N

FPV-XY2

K

S

K

T

V

D

N

FPV-XY3

K

S

K

T

V

D

N

FPV-XY4

K

A

K

T

V

D

N

FPV-XY5

K

A

K

T

V

D

N

FPV-XY6

K

S

K

T

V

D

N