Table 5. Analyzed pathways of metabolomics data differently regulated in lung tissue of chronic obstructive pulmonary disease rats.

Term	Total	Expected	Hits	Raw p
Biosynthesis of unsaturated fatty acids	42	0.65906	6	2.62E-05
Arachidonic acid metabolism	36	0.56491	4	0.0019285
Linoleic acid metabolism	5	0.078459	2	0.0022856
Sphingolipid metabolism	21	0.32953	3	0.0037176
Glycerophospholipid metabolism	30	0.47076	3	0.010353
Cyanoamino acid metabolism	6	0.094151	1	0.09069
alpha-Linolenic acid metabolism	9	0.14123	1	0.13304
Methane metabolism	9	0.14123	1	0.13304
Fatty acid biosynthesis	43	0.67475	2	0.1443
Steroid hormone biosynthesis	70	1.0984	2	0.3014
Cysteine and methionine metabolism	28	0.43937	1	0.36059
Glycine, serine and threonine metabolism	32	0.50214	1	0.40061
Steroid biosynthesis	35	0.54922	1	0.42905
Primary bile acid biosynthesis	46	0.72183	1	0.52269
Aminoacyl-tRNA biosynthesis	67	1.0514	1	0.66232