Table 2. Amino acid differences in the RBD of spikes.

	Representative strain name	GenBank Accession No.	Amino acid position
			344	360	472	479	480	487
2002/2003 human outbreak	Tor2	AY274119	K	F	L	N	D	T
2002/2003 Civet	SZ3	AY304486	R	S	L	K	D	S
2003/2004 human outbreak	GD03	AY525636	R	S	P	N	G	S
2003/2004 Civet	PC04	AY613951	R	S	P	R	G	S