A systematic comparison of the MetaCyc and KEGG pathway databases

BMC Bioinformatics

Table 2 Comparison of compound data content in MetaCyc and KEGG

	MetaCyc	KEGG
Compounds	11991	15161
Compounds with structures	10546	14621
Compounds with comments	1486	2997
Mean comment length	47.69	6.51
Mean names per compound	2.37	1.62
Mean DB links per compound	1.71	3.71
Mean associated reactions	3.59	2.17
Mean associated pathways (all) per compound	1.78	0.67
Duplicate compounds	36	251

Compound entries in either DB may not have information on their chemical structures, and may not have comments describing the properties of the compound. Associated pathways of a compound include base pathways and superpathways in MetaCyc and KEGG maps and modules. Compounds were considered duplicates if they had identical standard InChI strings.

ISSN: 1471-2105