TABLE 2.

Common substitution sites in S among MHV host range models

Virus	S protein position by residue
	936	939	949	1120
A59	M	P	S	I
pi23a	M	P	R	I
pi600a	L	P	R	T
MHV/BHKa	L	P	R	T
V51	V	L	I	T
C4b	M	ΔP	R	T

^aReference 52.

^bUnpublished data.