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Table 2 Pathway database content statistics

From: Critical assessment of human metabolic pathway databases: a stepping stone for future integration

  Number of
Database Genes EC numbers Metabolites Reactions
BiGG 1496 645 1485 2617
EHMN 2517 940 2676 3893
HumanCyc 3586 1215 1681 1785
KEGG 1535 726 1553 1635
Reactome 1159 356 984 1175
  1. Genes: counts are based on the internal database identifiers and including genes encoding for a component of a protein complex as separate entities. EC numbers: only fully specified EC numbers are counted. Metabolites: counts are based on the internal database identifiers and including instances of metabolite classes for HumanCyc and members of sets for Reactome. Reactions: if reactions only differ in direction and/or compartments they are counted as one.