chemistry	substrate_class	n_reactions	n_unmapped	pct_unmapped
hydroxylation	steroid / sterol	53	34	64%
other/unclassified	steroid / sterol	44	31	70%
hydroxylation	eicosanoid / PUFA	32	28	88%
hydroxylation	other fatty acid	29	18	62%
epoxidation	eicosanoid / PUFA	26	15	58%
other/unclassified	other/unclassified	23	14	61%
hydroxylation	other/unclassified	12	10	83%
aromatization (formate-releasing)	steroid / sterol	10	5	50%
other/unclassified	eicosanoid / PUFA	8	2	25%
oxo-formation (alcohol to aldehyde/ketone)	steroid / sterol	8	8	100%
hydroxylation	retinoid	7	2	29%
epoxidation	other/unclassified	5	2	40%
other/unclassified	other fatty acid	5	5	100%
oxo-formation (alcohol to aldehyde/ketone)	eicosanoid / PUFA	5	1	20%
hydroxylation	vitamin K / quinone	4	3	75%
hydroxylation	xenobiotic / drug	4	3	75%
other/unclassified	retinoid	4	3	75%
oxo-formation (alcohol to aldehyde/ketone)	other/unclassified	4	4	100%
oxo-formation (alcohol to aldehyde/ketone)	retinoid	3	3	100%
S-oxidation	xenobiotic / drug	2	2	100%
carboxylate formation (aldehyde to acid)	other fatty acid	2	2	100%
epoxidation	steroid / sterol	2	2	100%
oxo-formation (alcohol to aldehyde/ketone)	other fatty acid	2	2	100%
carboxylate formation (aldehyde to acid)	eicosanoid / PUFA	1	0	0%
epoxidation	retinoid	1	1	100%
other/unclassified	xenobiotic / drug	1	1	100%