Table 1.

Summary of the distribution of protein sequences in the EC classes. (Due to the assignment of some proteins to multiple EC classes, the sum of the entries in the column labeled prots is more than 15,208.)

EC	Name	nodes at level			prots.	number of proteins in the leaves
		2	3	4		1	2–5	6–10	11–50	> 50
1	Oxidoreductases	19	64	311	3766	84	116	56	44	11
2	Transferases	9	24	333	4363	68	139	63	51	12
3	Hydrolases	8	42	430	4649	127	173	66	49	15
4	Lyases	7	15	131	1604	23	49	21	36	2
5	Isomerases	6	15	54	576	7	22	9	14	2
6	Ligases	5	9	68	655	6	17	26	18	1
	Total	54	169	1327	15208	315	516	241	212	43