Status	Description	Organism	Genes	References
	4-hydroxybutyryl-CoA synthetase	Acidianus hospitalis	GHY6-2324
	4-hydroxybutyryl-CoA synthetase	Metallosphaera cuprina	GHTI-836
	4-hydroxybutyryl-CoA synthetase	Sulfolobus acidocaldarius	G13GI-2089
	4-hydroxybutyryl-CoA synthetase	Sulfolobus acidocaldarius	GH9J-2083
	4-hydroxybutyryl-CoA synthetase	Sulfolobus islandicus	GI01-555
	4-hydroxybutyryl-CoA synthetase	Sulfolobus tokodaii	GJC7-2300