Table 12. Distribution of families among the twelve crotonase superfamily clusters produced by the GP system.

Cluster	Size	Family	Amount
I	29	methylmalonyl-CoA decarboxylase	29/30
II	55	diffusible signal factor (DSF) synthase	55/55
III	58	dodecenoyl-CoA delta-isomerase (peroxisomal)	58/65
IV	68	polyketide biosynthesis enoyl-CoA hydratase	35/40
		feruloyl-CoA hydratase/lyase	33/33
V	84	dodecenoyl-CoA delta-isomerase (mitochondrial)	84/87
VI	178	1,2-epoxyphenylacetyl-CoA isomerase	143/143
		enoyl-CoA hydratase	34/1,507
		dodecenoyl-CoA delta-isomerase (peroxisomal)	1/65
VII	201	delta(3,5)-delta(2,4)-dienoyl-CoA isomerase	201/201
VIII	217	1,4-dihydroxy-2-napthoyl-CoA synthase	217/217
IX	253	methylglutaconyl-CoA hydratase 2	252/269
		polyketide biosynthesis enoyl-CoA hydratase	1/40
X	286	enoyl-CoA hydratase	227/1,507
		crotonobetainyl-CoA hydratase	47/47
		polyketide biosynthesis enoyl-CoA hydratase	4/40
		dodecenoyl-CoA delta-isomerase (peroxisomal)	3/65
		methylglutaconyl-CoA hydratase 2	3/269
		dodecenoyl-CoA delta-isomerase (mitochondrial)	1/87
		methylmalonyl-CoA decarboxylase	1/30
XI	404	enoyl-CoA hydratase	404/1,507
XII	861	enoyl-CoA hydratase	842/1,507
		methylglutaconyl-CoA hydratase 2	14/269
		dodecenoyl-CoA delta-isomerase (peroxisomal)	3/65
		dodecenoyl-CoA delta-isomerase (mitochondrial)	2/87