Table 2.

Allelic variation present in the 12 GAS genes sequenced in 37 strains

Gene	No. of alleles	% Polymorphic nucleotides	Protein variants*	% Polymorphic amino acids
spy2211	12	1.7	11	2.2
spy1986	15	6.8	14	5.9
spy1972	12	2.9	12	3.9
spy1858	12	1.8	12	3.2
spy1857	6	1.2	2	0.4
spy1361	15	3.4	15	7.2
spy1239	12	1.5	9	1.6
spy0872	12	2.7	11	3.7
spy0843	13	1.6	13	2.9
spy0747	15	1.6	14	2.2
spy0501	13	2.0	10	2.1
spy0277	11	1.9	10	2.3
Average	12.3	2.4	11.1	3.1

^*Number of distinct proteins arising from amino acid replacements.