Table 1.

List of species with 18 or more experimentally elucidated pathways represented in MetaCyc (meaning that there is experimental evidence for the occurrence of these pathways in the organism)

Bacteria		Eukarya		Archaea
Escherichia coli	276	Arabidopsis thaliana	311	Methanosarcina barkeri	20
Pseudomonas aeruginosa	66	Homo sapiens	186	Methanocaldococcus jannaschii	21
Bacillus subtilis	57	Saccharomyces cerevisiae	134	Methanosarcina thermophila	18
Pseudomonas putida	49	Rattus norvegicus	77	Sulfolobus solfataricus	18
Salmonella typhimurium	36	Glycine max	67
Pseudomonas fluorescens	30	Mus musculus	50
Mycobacterium tuberculosis	26	Solanum lycopersicum	48
Agrobacterium tumefaciens	25	Pisum sativum	47
Enterobacter aerogenes	25	Zea mays	46
Klebsiella pneumoniae	21	Solanum tuberosum	41
Mycobacterium smegmatis	18	Nicotiana tabacum	39
Delftia acidovorans	18	Oryza sativa	35
		Hordeum vulgare	31
		Spinacia oleraca	25
		Triticum aestivum	23
		Bos taurus	22
		Sus scrofa	18
		Petunia × hybrida	18

The species are grouped by taxonomic domain and are ordered within each domain based on the number of pathways (number following species name) to which the given species was assigned. Some pathways may be labeled with a higher-level taxon, such as genus, if all the species within that genus are thought to have the given pathway. However, such higher-level taxa are not included in this table.