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. 2003 Nov;13(11):2455–2466. doi: 10.1101/gr.1212003

Table 5.

The Number of Reactions, Mappings, and Mappings per Reaction for Each EC Class in the Reference Metabolism

EC class 1 2 3 4 5 6
Reactions 315 387 181 166 61 68
Mappings 848 1269 544 396 75 344
Mappings/reaction 2.7 3.3 3.0 2.4 1.2 5.1