Table 3.

Statistics of bacterial aaRS enzymes in Swiss-Prot data

EC	# doublets	# triplets	# Proteins	% multiples	S61
6.1.1.1	18	0	474	3.80
6.1.1.2	3	0	125	2.40
6.1.1.3	1	0	616	0.16	x
6.1.1.4	2	0	703	0.28	x
6.1.1.5	10	0	524	1.91	x
6.1.1.6	60	3	527	12.52
6.1.1.7	1	0	628	0.16	x
6.1.1.9	0	0	293	0.00	x
6.1.1.10	2	0	421	0.48	x
6.1.1.11	4	0	735	0.54	x
6.1.1.12	2	0	688	0.29	x
6.1.1.13	68	1	172	40.70
6.1.1.14	276	0	825	33.45
6.1.1.15	10	0	762	1.31	x
6.1.1.16	14	0	691	2.03	x
6.1.1.17	114	0	808	14.11
6.1.1.18	0	0	139	0.00	x
6.1.1.19	4	0	675	0.59	x
6.1.1.20	251	0	877	28.62
6.1.1.21	6	0	627	0.96	x
6.1.1.22	1	0	256	0.39	x

The column '%multiples' refers to the percentage of species that display multiple proteins with the same EC number. The sub-set S61, defined by x entries in the last column, is selected for taxonomic classification.